Physics Electromagnetism Online Mcqs Test

Q: How can I prepare for Physics Electromagnetism Online Mcqs Test?

You can prepare for Physics Electromagnetism Online Mcqs Test by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called

Answer

Magnetic flux

Answer

Magnetic field intensity

Answer

Magnetic induction

Answer

Self inductance

Question 2

2. A magnetic field

Answer

Always exerts a force on a charged particle

Answer

Exerts a force if the charged particle is moving in the direction of the magnetic field lines

Answer

Exerts a force if the charged particle is moving perpendicular to the magnetic field lines

Answer

Never exerts a force on a charged particles

Question 3

3. Which one of the following material is most suitable for making core of an electromagnet?

Answer

Cu-Ni alloy

Question 4

4. Magnetic flux and flux density are related by

Answer

Magnetic flux = flux density/area

Answer

Magnetic flux = flux density x area

Answer

Flux density = magnetic flux area

Answer

Flux density = magnetic flux x area

Question 5

5. Galvanometer is a very sensitive device with

Answer

Very low damping

Answer

Very high damping

Answer

No damping at all

Answer

Radial field disintegration

Question 6

6. Which one of the following methods would be able to increase the sensitivity of a moving coil galvanometer?

Answer

Connect a shunt across the coil

Answer

Use a coil of smaller cross sectional area

Answer

Use a coil having less number of turns

Answer

Use spiral springs whose force constant is small

Question 7

7. An instrument which can measure potential without drawing any current is

Answer

Galvanometer

Answer

Cathode ray oscilloscope (CRO)

Question 8

8. When the coil of the galvanometer is in equilibrium then the deflection couple is

Answer

Equal to the restoring couple

Answer

Greater than the restoring couple

Answer

Smaller than the restoring couple

Question 9

9. Which one of the following is not an electro mechanical instrument?

Answer

Galvanometer

Answer

AC transformer and DC generator

Question 10

10. In a multi range ammeter as the range increases

Answer

Shunt value decreases

Answer

Shunt value increases

Answer

Shunt value remains the same

Answer

None of these

Question 11

11. An ammeter measures the total current flowing through a circuit when it is connected

Answer

In series with the circuit

Answer

In parallel with circuit

Answer

In series with any of the parallel resistances in the circuit

Answer

In parallel with any of the series resistances in the circuit

Question 12

12. The path along which an isolated north pole of a magnet moves in the magnetic field is called

Answer

Magnetic field

Answer

Magnetic Field Lines

Answer

Electric Lines of Force

Question 13

13. The S.I. units of magnetic field is

Answer

None of these

Question 14

14. The SI unit of magnetic induction is

Question 15

15. One tesla is equal to

Answer

1 Nm A¯¹

Answer

1 NA¯¹ m¯¹

Answer

1 Nm¯¹ A

Answer

None of these

Question 16

16. Ampere’s law in analogous to

Answer

Faraday’s law

Answer

Guass’s law

Answer

Lenz’s law

Answer

None of these

Question 17

17. When the magnetic flux changes through a loop on a coil, an induced emf is produced in it. This is called

Answer

Ampere’s law

Answer

Faraday’s law

Answer

Lenz’s law

Answer

Guass’s law

Question 18

18. When a proton enters into a magnetic field perpendicularly, the proton will experience a force along the

Answer

Upward direction

Answer

Downward direction

Answer

Undeflected

Answer

None of these

Question 19

19. A device which produces a voltage difference between two terminals by changing flux through the coil is called

Answer

Resistance box

Answer

Electric motor

Answer

Electric generator

Answer

Transformer

Question 20

20. Electric force is the force which is experienced by a positive charge to produce

Answer

Displacement

Answer

Attraction

Answer

None of these

Question 21

21. Choose the correct statement

Answer

Both an ammeter and voltmeter should have small resistance

Answer

Both an ammeter and voltmeter should have large resistance

Answer

An ammeter should have large resistance and a voltmeter should have small resistance

Answer

An ammeter should have small resistance and a voltmeter should have large resistance.

Question 22

22. The torque ‘τ’ produced by the coil of the galvanometer is

Answer

NBA cos α

Answer

NIBA sin α

Answer

NIAB cos α

Answer

None of these

Question 23

23. An electron is projected along the axis of a circular conductor carrying some current. Electron will experience force

Answer

Along the axis

Answer

Perpendicular to the axis

Answer

At an angle of 4° with axis

Answer

No force experienced

Question 24

24. The current passing through the coil of moving coil galvanometer is directly proportional to

Answer

Number of turns

Answer

Angle of deflection

Answer

Magnetic field

Answer

None of these

Question 25

25. In order to convert galvanometer into voltmeter, a resistor is connected in series with the galvanometer

Answer

A low resistor

Answer

Semi conductor

Answer

A very high resistor

Question 26

26. In case of a suspended coil galvanometer the Restoring torque =

Answer

None of these

Question 27

27. The resistance of voltmeter must have very high resistance because

Answer

It does not draw any current

Answer

It is very accurate

Answer

It does not change considerably

Answer

None of these

Question 28

28. According to Ampere Circuital law, the sum of the quantities B,∆L for all path elements into which the complete loop has been divided =

Answer

None of these

Question 29

29. Velocity (V), Magnetic force (F), and magnetic field (B) are

Answer

Mutually perpendicular

Answer

V and B are perpendicular

Answer

F and B are perpendicular

Question 30

30. Magnetic flux passing normally, through a unit area is called

Answer

Magnetization

Answer

Magnetic field Intensity

Answer

Magnetic flux density

Answer

All of these

Question 31

31. When a charged particle is projected perpendicularly in a magnetic field, its trajectory is

Question 32

32. When a charged particle q is moving with velocity v in region where there is an electric field E and magnetic field B, the total force F is given as

Answer

F = qE + q(V x B)

Answer

F = qE + qB

Question 33

33. Working of a galvanometer depends on

Answer

Force exerted on a coil

Answer

Torque on a coil

Answer

Induced emf

Answer

None of these

Question 34

34. The direction of Lorentz force depends on the sign of change in a magnetic field

Answer

Both positive and negative

Question 35

35. DMM is

Answer

Digital version of AVO meter

Answer

Digital version of Ohm meter

Answer

Digital version of Ammeter

Question 36

36. A digital multi meter is preferred over ordinary AVO meter because

Answer

No needle is used

Answer

Error free reading

Answer

No battery is used

Answer

None of these

Question 37

37. The S.I unit of magnetic induction is

Question 38

38. If a diamagnetic substance is brought near north or south pole of a bar magnet it is

Answer

Attracted by the poles

Answer

Repelled by the poles

Answer

Repelled by north pole and attracted by the south pole

Answer

Attracted by the north pole and repelled by the south pole

Question 39

39. A moving charge will gain energy due to the application of

Answer

Electric field

Answer

Magnetic field

Answer

Both of these

Answer

None of these

Question 40

40. The incorrect statement regarding the lines of force of the magnetic field B is

Answer

Magnetic intensity is a measure of lines of force passing through unit area held normal to it

Answer

Magnetic lines of force form a close curve

Answer

Inside a magnet, its magnetic lines of force move from north pole of a magnet towards its south pole.

Answer

Due to a magnet magnetic lines of force never cut each other.

Question 41

41. If in a moving coil galvanometer a current I produces a defection θ, then

Answer

i ∞ tan θ

Answer

i ∞ θ²

Answer

i ∞ √θ

Question 42

42. The sensitivity of galvanometer depends on

Answer

Earth’s magnetic field

Answer

Angle of deflection

Answer

Moment of inertia of coil

Answer

None of these

Question 43

43. A charge of 1 C is moving in a magnetic field of 0.5 tesla with velocity of 10 m/s. Force experienced is

Question 44

44. A current carrying coil when freely suspended will align itself

Answer

Parallel to the magnetic meridian

Answer

Perpendicular to the magnetic meridian

Answer

At an angle of 45° to the magnetic meridian

Answer

Any of the above positions

Question 45

45. Identify the paramagnetic substance

Question 46

46. If a ammeter is to be used in place of a voltmeter, then we must connect with the ammeter

Answer

Low resistance in parallel

Answer

High resistance in parallel

Answer

High resistance in series

Answer

Low resistance in series

Question 47

47. If an electron and a proton having same momenta enter perpendicular to a magnetic field, then

Answer

Curved path of electron and proton will be same (ignoring the sense of revolution)

Answer

They will move un-deflected

Answer

Curved path of electron is more curved than that of the proton

Answer

Path or proton is more curved

Question 48

48. The Weber ampere per meter is equal to

Question 49

49. When a charged particle enters in a uniform magnetic field, its kinetic energy

Answer

Remains constant

Answer

Becomes zero

Question 50

50. If the current is doubled, the deflection is also doubled in

Answer

A tangent galvanometer

Answer

A moving coil galvanometer

Answer

Both A and B

Answer

None of these

Question 51

51. Which of the following statements is incorrect about hysteresis?

Answer

This effect is common to all ferromagnetic substances

Answer

The hysteresis loop area is proportional to the thermal energy developed per unit volume of the material

Answer

The hysteresis loop area is independent of the thermal energy developed par unit volume of the material

Answer

The shape of the hysteresis loop is characteristic of the material

Question 52

52. An electron is projected along the axis of a circular conductor carrying some current. Electron will experience force

Answer

Along the axis

Answer

Perpendicular to the axis

Answer

At an angle of 4° with axis

Answer

No force experienced

Question 53

53. To convert a moving coil galvanometer into voltmeter the value and type of connection of the resistance to be connected with should be

Answer

Low ad parallel

Answer

High and parallel

Answer

Low and series

Answer

High and series

Question 54

54. The magnetic moment of a current (I) carrying circular coil of radius (r) and number of turns (n) varies as

Question 55

Loading...

Total Questions:	56
Time Allowed:	25 Minutes
Total Marks:	56
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Physics Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Physics Interview Question Answer

Physics Electromagnetism Online Mcqs Test

Important Physics Electromagnetism Question and Answer

Physics Electromagnetism Practice Test Online With Explanation

How to Score High in Physics Electromagnetism Online Mcqs Test?

Key Preparation Tips:

Malik Tahir

Leave a Reply Cancel reply

Important Physics Electromagnetism Question and Answer

Physics Electromagnetism Practice Test Online With Explanation

How to Score High in Physics Electromagnetism Online Mcqs Test?

Key Preparation Tips:

Related Content

Malik Tahir

Leave a Reply Cancel reply