Physics Nuclear Physics Online Mcqs Test

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Question 1

1. Neutron and proton are commonly known as

Question 2

2. Electrons

Answer

Can exist inside the nucleus

Answer

Cannot exist inside the nucleus

Answer

Can exist both inside and outside the nucleus

Answer

Do not know

Question 3

3. Transuranic elements have atomic number

Answer

Greater than 72

Answer

Greater than 82

Answer

Greater than 92

Answer

Greater than 102

Question 4

4. Nuclear forces exist between

Answer

Proton-proton

Answer

Proton-neutron

Answer

Neutron-neutron

Answer

All of these

Question 5

5. A particle having the mass of an electron and the charge of a proton is called a

Answer

Antiproton

Answer

Gamma rays

Question 6

6. Alpha radiation are advised for the treatment of skin of a patient because

Answer

They are positively charger

Answer

They are helium nuclei

Answer

They are highly ionizing

Answer

They are less penetration

Question 7

7. Beta particle has penetration power

Answer

100 times more than that of an alpha particle

Answer

100 times has than that of an alpha particle

Answer

10 times more than that of an alpha particle

Answer

1000 times less than of an a- particle

Question 8

8. An alpha particle has a charge of:

Question 9

9. Alpha particles are highly ionizing due to

Answer

Their greater density

Answer

Their high charge and low speed

Answer

Their greater energy

Answer

Their greater mass

Question 10

10. Beta particles are much less ionizing than alpha particles because of

Answer

Their smaller charge and large speeds

Answer

Their smaller mass

Answer

Their smaller energy

Answer

They’re coming out of the nuclei

Question 11

11. beta-Particles possess greater penetration power than that of alpha – particles due to its

Answer

Greater ionization power

Answer

Smaller ionization power

Answer

Neither greater now smaller ionization power

Answer

The same ionization power

Question 12

12. Alpha particles are highly ionizing because of:

Answer

Their high charge and low speeds

Answer

Their greater mass

Answer

Their larger energy

Answer

Their constituents

Question 13

13. Which one of the following radiation is extremely penetrating?

Answer

Alpha rays

Answer

Gamma rays

Question 14

14. Out of 10 mg of a radio active sample, 1.25 mg remains undecayed after 6 hours. The mean life of the sample in hours is

Question 15

15. Half life of radium is 1590 years. In how many years shall the earth loss all its radium due to radioactive decay?

Answer

1590 x 10⁶ years

Answer

1590 x 10¹² years

Answer

1590 x 10²⁴ years

Question 16

16. Mass defect per nucleon is

Answer

Binding energy of nucleus

Answer

Packing fraction

Answer

Average energy of nucleus

Answer

All of above are one and same thing

Question 17

17. Average energy required to remove one nucleon from the nucleus is called

Answer

Binding energy per nucleon

Answer

Energy of decay

Answer

Destruction energy

Answer

All of these

Question 18

18. The half lives of radioactive elements X and Y 3 minutes and 27 minutes respectively. If the activities of both are same, then the ratio of number of atoms of X and Y will be

Question 19

19. Draw-back of Geiger counter is

Answer

Very high voltage

Answer

Slow counting

Answer

Both A and B

Answer

None of these

Question 20

20. Geiger counter is suitable

Answer

For slows counting

Answer

For fast counting

Answer

For extremely fast counting

Answer

For fast and slow counting

Question 21

21. A Geiger counter counts radioactive particles by

Answer

Collecting and measuring the charges of the particles

Answer

Under going a chemical reaction with each incident, particle

Answer

Amplifying the sound theory make as theory strike the walls of tube

Answer

Emitting detectable light pulses when struck

Question 22

22. A device that may be used to detect the passage of a single, light energy charged particle is called a

Answer

Mass spectro graph

Answer

Geiger counter

Answer

Wilson’s cloud Chamber

Question 23

23. A solid state detector mainly consists of a

Answer

Silicon diode

Answer

Germanium Crystal

Answer

Silicon crystal

Answer

Transistor

Question 24

24. During fusion of hydrogen into helium

Answer

Energy is absorbed

Answer

Energy is released

Answer

Mass is increased due to energy absorption

Answer

Mass is reduced due to energy released

Question 25

25. For chain reaction to build up the size of the radioactive target should be

Answer

greater than the critical size

Answer

less than the critical size

Answer

equal to the critical size

Answer

all of above can build up a change reaction

Question 26

26. Mass defect per nucleon is

Answer

Binding energy of nucleus

Answer

Packing fraction

Answer

Average energy of nucleus

Answer

All of above are one and sane thing

Question 27

27. Tick the correct statement

Answer

Moderators slow down the neutrons

Answer

Moderators bring the neutrons to rest

Answer

Moderators absorb the neutrons

Answer

Moderators reflect the neutrons

Question 28

28. Fission chain reaction in a nuclear reactor can be controlled by introducing

Answer

Graphite rods

Answer

Cadmium rods

Answer

Platinum rods

Question 29

29. During fission process a large amount of

Answer

Heat energy is released

Answer

Nuclear energy is released

Answer

Chemical energy is released

Answer

Light energy is released

Question 30

30. If one or more of the neutrons emitted during fission can be used to build up further fission then the reaction is self sustained and is known as

Answer

Fission reaction

Answer

Fusion reaction

Answer

Chain reaction

Answer

Chemical reaction

Question 31

31. Neutron was discovered in 1932 by

Question 32

32. How many times the radius of the atom is larger than the radius of the nucleus

Answer

None of these

Question 33

33. The total charge of any nucleus is

Answer

None of these

Question 34

34. The de Broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it

Question 35

35. A mass spectrograph is the device which is use to

Answer

Separate isotopes

Answer

Find the isotopes

Answer

Find the neutrons

Question 36

36. The mass density of a nucleus varies with mass number A as

Question 37

37. The most abundant isotope of neon is

Question 38

38. For the structural analysis of crystals, X-rays are used because

Answer

X-rays have wavelength of the order of the inter-atomic spacing

Answer

X-rays are highly penetrating radiations

Answer

Wavelength of X-rays is of the order of nuclear size

Answer

X-rays are coherent radiations

Question 39

39. How many types of radiations are radiated from a radioactive elements?

Answer

α, β, ϒ

Question 40

40. Mass defect of an atom refers to

Answer

Inaccurate measurement of mass of nucleons

Answer

Mass annihilated to produce energy to bind the nucleus

Answer

Packing fraction

Answer

Difference in number of neutrons and protons in the nucleus

Question 41

41. Marie curie and Pierre Curie discovered two radioactive elements which are

Answer

Uranium and Polonium

Answer

Polonium and Radium

Answer

Radium and uranium

Answer

Uranium and Plutonium

Question 42

42. Which of the following undergo fission reaction easily by slow moving neutrons?

Answer

U-235, P-239

Answer

P-239, Th-234

Answer

U-238, Rn-232

Answer

Th-234, U-228

Question 43

43. Radioactivity is purely a nuclear phenomenon, and is not affected by

Answer

Physical or chemical reaction

Answer

Temperature

Answer

All of these

Question 44

44. A radioactive reaction is ₉₂U²³⁸ →₈₂Pb²⁰⁶. How many α and β particles are emitted?

Answer

4 protons, 8 neutrons

Answer

6 electrons, 8 protons

Question 45

45. When an α -particle emitted, the change in the nucleus is

Answer

“A” decreases 4 “Z” decreases 3

Answer

“A” decreases 4 “Z” decreases 2

Answer

“A” decreases 4 Z decreases 2

Answer

None of these

Question 46

46. The number of atoms decaying in a particular period is proportional to

Answer

Atoms present

Answer

Atoms decayed

Answer

Atoms after decayed

Answer

None of these

Question 47

47. The half-life of iodine -131 is

Question 48

48. Ionization of matter, when α –particle pass through it is by

Answer

Direct elastic collision

Answer

Electrostatic attraction

Answer

Inelastic collision

Question 49

49. A nucleus nXᵐ emits one α and β-particles. The resulting nucleus is

Question 50

50. The rate of disintegration of an isotope is 10¹⁷ atoms/second and half-life is 1445 years. Then number of atoms of the starting sample of the element is

Answer

1.44 x 10¹⁷

Answer

1.4 x 10¹⁷

Answer

6.57 x 10²⁷

Answer

None of these

Question 51

51. The time taken by the entire electron pulse to reach anode, in Geiger Muller tube is

Answer

Less than 1 μs

Answer

More than 1 μs

Answer

None of these

Question 52

52. The dead time of the Geiger Muller counter is

Answer

~ 10¯⁴ sec

Answer

~ 10¯⁵ sec

Answer

~ 10¯⁶ sec

Answer

None of these

Question 53

53. The principle gas filled with the small amount of gas in a Geiger Muller tube is

Answer

More than 50%

Answer

More than 70%

Answer

More than 80%

Answer

More than 35%

Question 54

54. The quenching of gas by a quenching gas is called

Answer

Self quenching

Answer

Forced quenching

Answer

None of these

Question 55

55. Geiger Muller counter can be used to determine the

Answer

Range of ionizing particle

Answer

Mass of ionizing particle

Answer

Charge of ionizing particle

Answer

None of these

Question 56

56. Solid state detectors are

Answer

More efficient

Answer

Fast enough

Answer

All of these

Question 57

57. In the breakage of ²³⁵₉₂U the average neutron emitted are

Answer

Two neutron

Answer

2.5 neutron

Answer

Three neutron

Answer

None of these

Question 58

58. The average binding energy of a nucleon inside an atomic nucleus is about

Question 59

59. The mass density of a nucleus varies with mass number A as

Question 60

60. Curie is a unit of

Answer

Energy of gamma-rays

Answer

Radioactivity

Answer

Intensity of gamma-rays

Question 61

61. The energy released in a typical nuclear fusion reaction is approximately

Question 62

62. The binding energy per nucleon is of maximum value in case of

Answer

⁵⁶₂₆Fe

Answer

¹⁴¹₅₆Ba

Answer

²³⁵₉₂U

Question 63

63. Mass defect of an atom refers to

Answer

Inaccurate measurement of mass of nucleons

Answer

Mass anihilinated to produce energy to bind the nucleus

Answer

Packing fraction

Answer

Difference in number of neutrons and protons in the nucleus

Question 64

64. Which of the following undergo fission reaction easily by slow moving neutrons?

Answer

U-235, P-239

Answer

P-239, Th-234

Answer

U-238, Rn-232

Answer

Th-234, U-238

Answer 179

Increasing the current in the filament

Answer 180

Decreasing the current in the filament

Answer 181

Increasing the potential difference between the cathode and the anode

Answer 182

Decreasing the potential difference between the cathode and anode

Answer 183

a > b, b > c

Answer 184

a < b, b < c

Answer 185

a < b, b > c

Answer 186

a > b, b < c

Answer 187

E = - Rhc/n²

Answer 188

K.E. = ½ mv²

Answer 189

i, ii, iii

Answer 190

i, ii, iii, iv

Answer 191

β-emission

Answer 192

α-emission

Answer 193

e¯ capture

Answer 194

Would decrease

Answer 195

Would increase

Answer 196

Would remain the same

Answer 197

My increase or decrease depending on the polarization of light

Answer 198

An energetic neutron emitted by a nucleus

Answer 199

An energetic electron emitted by a nucleus

Answer 200

An energetic photon emitted by a nucleus

Answer 201

An energetic proton emitted by a nucleus

Answer 202

The intensity of incident light

Answer 203

The frequency of light

Answer 204

The wavelength of light

Answer 205

None of these

Answer 206

13.6 x 11 eV

Answer 207

13.6 x 11² eV

Answer 208

13.6 x 11³ eV

Answer 209

₇N¹⁴ + ₀n¹ → ₇N¹⁶ + ₁H¹

Answer 210

₁₆N³² + ₁H¹ → ₁₇CI³⁵ + ₂He⁴

Answer 211

₈O¹⁶ + ₀n¹ → ₇N¹⁴ +3 ₁H¹ + 2 ₋₁β⁰

Answer 212

₁H¹ + ₁H¹ → ₂He⁴

Answer 213

v = 2 v₀

Answer 214

2.32 x 10¹⁴ Hz

Answer 215

4.64 x 10¹⁴ Hz

Answer 216

4.64 x 10¹⁶ Hz

Answer 217

4.64 x 10¹⁸ Hz

Answer 218

Charge of electron

Answer 219

Mass of electrons

Answer 220

Revolution of electron around the nucleus

Answer 221

Speed of electrons

Answer 222

Intensity of incident radiations

Answer 223

Frequency of incident radiations

Answer 224

Square of intensity of incident radiations

Answer 225

Square of the frequency of incident radiations

Answer 226

Frequency of incident radiation should be less than threshold frequency

Answer 227

Frequency of incident radiation may have any value

Answer 228

Weave length of incident radiation should be less than threshold wavelength

Answer 229

Wavelength of incident radiation may have any value

Answer 230

Wavelength of incident light

Answer 231

Frequency of incident light

Answer 232

Intensity of incident light

Answer 233

All of these

Answer 234

Photo-electric effect

Answer 235

Interference

Answer 236

Refraction

Answer 237

Polarization

Answer 238

Burning of hydrogen

Answer 239

Fission reactions involving hydrogen

Answer 240

Fusion reaction involving hydrogen

Answer 241

Some other source

Answer 242

1.5 x 10⁹

Answer 243

4.62 x 10⁸

Answer 244

6.67 x 10⁸

Answer 245

10.35 x 10⁸

Answer 246

Do not get deflected at all

Answer 247

Get deflected in the direction of the filed

Answer 248

Get deflected in the direction opposite to the filed

Answer 249

Get deflected in the direction perpendicular to the field

Answer 250

> or = Np + Nn

Answer 251

More than 13.6 eV

Answer 252

Atomic number

Answer 253

Mass number

Answer 254

Temperature

Answer 255

None of these

Answer 256

– 10.2 eV

Answer 257

– 3.40 eV

Answer 258

– 1.51 eV

Answer 259

– 0.85 eV

Answer 260

Reproduction of films from the cinema files

Answer 261

Reproduction of sound from the cinema films

Answer 262

Automatic switching of street light

Answer 263

Both B and C

Answer 264

A neutron is converted to proton and an electron is emitted

Answer 265

Valence electron is driven out of the outer shell

Answer 266

By product of transition of electron from inner to outer shell

Answer 267

By product of transition of electron from outer to inner shell

Answer 268

About 1/3 of substance disintegrates

Answer 269

About 90% of the substance disintegrates

Answer 270

About 2/3 of the substance disintegrates

Answer 271

Almost all the substance disintegrates

Answer 272

₉₂U²³⁵ is bombarded with fast moving neutrons

Answer 273

₉₂U²³⁵ is bombarded with thermal neutron

Answer 274

U²³⁸ is bombarded with slow moving neutrons

Answer 275

U²³⁵ being unstable breaks into smaller fragment

Answer 276

Atomic state

Answer 277

Molecular state

Answer 278

Plasma state

Answer 279

Ionized state

Answer 280

Atomic state

Answer 281

Molecular state

Answer 282

Plasma state

Answer 283

Ionized state

Answer 284

Is a form of transverse wave

Answer 285

Is a form of longitudinal wave

Answer 286

Can be polarized

Answer 287

Consists of quanta

Answer 288

Intensity of incident light

Answer 289

Frequency of incident light

Answer 290

Both A and B

Answer 291

Neither A not B

Answer 292

5.39 x 10¯⁸ e

Answer 293

None of these

Answer 294

8 x 10¯³ eV

Answer 295

1.44 x 10¹⁷

Answer 296

1.4 x 10¹⁷

Answer 297

6.57 10²⁷

Answer 298

None of these

Answer 299

Nuclear reactor and sun

Answer 300

Sun and hydrogen bomb

Answer 301

Nuclear reactor and atom bomb

Answer 302

Sun and atom bomb

Answer 303

a is true but b is false

Answer 304

b is true but a is false

Answer 305

Large mass defect

Answer 306

Large energy

Answer 307

Production of more neutrons in fission

Answer 308

None of these

Answer 309

11 electrons, 11 protons and 13 neutrons

Answer 310

11 electrons, 13 protons and 11 neutrons

Answer 311

11 protons and 13 neutrons

Answer 312

11 protons and 13 electrons

Answer 313

Number of electrons emitted is half the initial number

Answer 314

Each emitted electron carries half the initial energy

Answer 315

Number of electrons emitted is a quarter of the initial number

Answer 316

Each emitted electron carries one quarter of the initial energy

Answer 317

Compton effect

Answer 318

Raman effect

Answer 319

Pair production

Answer 320

Production of X-rays

Answer 321

None of these

Answer 322

Hydrogen atom

Answer 323

Deutrium atom

Answer 324

Single ionized helium

Answer 325

Doubly ionized helium

Answer 326

Neutrally charged

Answer 327

Ionized helium atoms

Answer 328

The laws of physics are the same in all inertial frames

Answer 329

The speed of light in free space has the same value in all inertial frames

Answer 330

Two events which occur simultaneously in one reference frame also must appear to occur simultaneous in another reference frame

Answer 331

Einstein rejected Newton’s idea of absolute time

Answer 332

Principle of Relativity

Answer 333

Uncertainty Principal

Answer 334

Pauli’s Exclusion Principle

Answer 335

None of these

Answer 336

All laws of physics are the same in every inertial reference frame

Answer 337

Every motion is relative

Answer 338

Light has dual nature

Answer 339

Energy and mass are inter convertible

Answer 340

Time is absolute

Answer 341

The speed of light in a vacuum, measured in all inertial reference frames always has the same value of c, no matter how fast the source of light and the observer are moving relative to each other

Answer 342

Space is absolute

Answer 343

At rest mass of an object is always zero

Answer 344

It is universal constant

Answer 345

It is same for all the hydrogen like atoms

Answer 346

It depends on the atomic number of the atom

Answer 347

It depends on the mass number of the atom

Answer 348

₅₄Xe¹⁴³ + 3 ₀n¹

Answer 349

₅₄Xe¹⁴⁵

Answer 350

₅₄Xe¹⁴²

Answer 351

₅₄Xe¹⁴² + ₀n¹

Answer 352

²⁰⁹₈₃Bi

Answer 353

²⁰⁹₈₂Pb

Answer 354

²⁰⁵₈₂T1

Answer 355

²⁰¹₈₂Hg

Answer 356

8,900 years

Answer 357

7,000 years

Answer 358

6,476 years

Answer 359

2,520 years

Answer 360

λT = 0.693

Answer 361

T/λ = 0.693

Answer 362

λ/T = 0.693

Answer 363

nXᵐ¯⁴

Answer 364

₂₋n Yᵐ¯⁴

Answer 365

n₋₄ Zᵐ¯⁴

Answer 366

n₋₁ Zᵐ¯⁴

Answer 367

L = L₀ √1-(v/c)²

Answer 368

L₀ = L √1-(v/c)²

Answer 369

L = L₀ √1+(v/c)²

Answer 370

L = L₀ √1- v/c

Answer 371

9 x 10 ¹⁶ J

Answer 372

9 x 10 ¹⁹ J

Answer 373

9 x 10 ¹³ J

Answer 374

9 x 10 ¹⁷ J

Answer 375

Black body

Answer 376

Black body radiation

Answer 377

Black body cavity

Answer 378

Cavity radiation

Answer 379

Special theory of relativity

Answer 380

Quantum theory

Answer 381

Corpuscular theory

Answer 382

Bohr’s theory

Answer 383

Atomic number

Answer 384

Mass number

Answer 385

Atomic number, Mass number and Energy

Answer 386

None of these

Answer 387

None of these

Answer 388

3 x 10⁸ ms¯¹

Answer 389

3 x 10⁸ cms¯¹

Answer 390

3 x 10⁸ cms¯²

Answer 391

3 x 10⁵ cms¯²

Answer 392

½ mv² max = hf - φ

Answer 393

9.0 x 10¹³ J

Answer 394

9.0 x 10¹⁹ J

Answer 395

3.0 x 10¹⁶ J

Answer 396

3.0 x 10¹⁷ J

Answer 397

Gamma rays

Answer 398

Helium nucleus

Answer 399

Frequency of incident light

Answer 400

Wavelength of incident radiation

Answer 401

Intensity of incident radiation

Answer 402

Speed of incident emitted from a metal surface

Answer 403

Wave theory of light

Answer 404

Special theory of light

Answer 405

Quantum theory of light

Answer 406

All of these

Answer 407

Light travels in the form of quanta of energy

Answer 408

Light travels in the form of transverse waves

Answer 409

Light travels in the form of longitudinal waves

Answer 410

Light is a transverse electromagnetic wave

Answer 411

Intensity of incident radiation

Answer 412

Wavelength of incident radiation

Answer 413

Frequency of incident radiation

Answer 414

Speed of incident emitted from a metal surface

Answer 415

Critical frequency

Answer 416

Threshold frequency

Answer 417

Minimum frequency

Answer 418

Work Function

Answer 419

Wavelength

Answer 420

Frequency of incident light

Answer 421

Wavelength

Answer 422

Visible light

Answer 423

Ultra-violet light

Answer 424

Infra-red light

Answer 425

Far-infra light

Answer 426

Equal to 100 cm

Answer 427

Less than 100 cm

Answer 428

Greater than 100 cm

Answer 429

None of these

Answer 430

Wave nature

Answer 431

Particle nature

Answer 432

Wave & particle nature

Answer 433

None of these

Answer 434

α-particle

Answer 435

Compton Effect

Answer 436

Photoelectrons

Answer 437

Photoelectric Effect

Answer 438

Pair Production

Answer 439

Both particles and Waves

Answer 440

None of these

Answer 441

Annihilation

Answer 442

Pair Production

Answer 443

Compton Effect

Answer 444

Photoelectric Effect

Answer 445

Pauli’s Exclusion Principle

Answer 446

Heisenberg Uncertainty

Answer 447

Photoelectric Effect

Answer 448

Compton Effect

Answer 449

Compton Effect

Answer 450

Photoelectric Effect

Answer 451

Pair production

Answer 452

Annhilation

Answer 453

The scattered photon has frequency less than that of the incident photon

Answer 454

The scattered photon has frequency greater than that of the incident photon

Answer 455

The scattered photon has frequency equal to the incident photon

Answer 456

None of these

Answer 457

Pair Production

Answer 458

Annihilation

Answer 459

X-rays Production

Answer 460

Compton Effect

Answer 461

Photoelectric Effect

Answer 462

Annihilation

Answer 463

X-rays Production

Answer 464

Compton Effect

Answer 465

Wave energy

Answer 466

Plank’s Constant

Answer 467

The laws of physics are the same in all inertial frames of reference

Answer 468

The speed of light in free space is universal constant

Answer 469

The speed of light is independent of the speed of the observer

Answer 470

All of these

Answer 471

The Compton effect

Answer 472

y-radiations

Answer 473

Photoelectric effect

Answer 474

Radiations pressure

Answer 475

A beam of double the intensity is used

Answer 476

Radiation of double the frequency is used

Answer 477

Radiation of double the wavelength is used

Answer 478

The temperature of the metal is doubled

Total Questions:	179
Time Allowed:	80 Minutes
Total Marks:	179
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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