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MDCAT Physics Electrostatics Test Online

Mustansar KhanLast Updated: May 26, 2025

Physics Electrostatics MCQS Online Test

MDCAT Physics Electrostatics Chapter Online Test

Total Questions:	48
Time Allowed:	25 Minutes
Total Marks:	48
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Physics Online Test Interview Questions about Physics All Universities Entrance Test Recruitments Tests

Physics Electrostatics Chapter Online Test

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1. The permittivity of free space (ε₀) is:

8.85 × 10⁻¹² F/m

3.00 × 10⁸ m/s

9.81 m/s²

1.60 × 10⁻¹⁹ C

2. What is an electric field?

A region where magnetic force is felt

The flow of electrons

A region where electric force is felt

A scalar quantity

3. If dielectric is inserted between plates, the capacitance:

Remains same

Decreases

Increases

Becomes zero

4. Which of the following has units of V/m?

Electric potential

Electric flux

Capacitance

Electric field intensity

5. Electric potential is defined as:

Charge per unit energy

Energy per unit mass

Work done per unit charge

Force per unit charge

6. Two capacitors are in series. Their equivalent capacitance is:

Infinite

Greater than the largest

Less than the smallest

Equal to the sum

7. During discharging of a capacitor, voltage:

Increases

Becomes constant

Decreases exponentially

Remains same

8. The unit of electric field intensity is:

Coulomb

Tesla

N/C or V/m

Volt

9. In Coulomb’s law, if the distance between charges is doubled, the force becomes:

Half

One-fourth

Double

Four times

10. Capacitance formula for a parallel plate capacitor is:

C = Q/V

C = Aε₀/d

C = d/ε₀A

C = V/Q

11. The SI unit of capacitance is:

Volt

Farad

Ohm

Henry

12. What is the direction of electric field lines?

Random

From positive to negative charge

Circular

From negative to positive

13. Which law governs the force between two point charges?

Ohm’s law

Coulomb’s law

Gauss’s law

Newton’s law

14. The value of Coulomb’s constant in vacuum is:

1.6 × 10⁻¹⁹ C

3.0 × 10⁸ m/s

9.81 m/s²

8.99 × 10⁹ N·m²/C²

15. The dielectric constant of vacuum is:

One

Zero

8.85 × 10⁻¹²

Infinite

16. Electric potential due to a point charge decreases with:

Square of distance

Inverse square root of distance

Distance

Inverse of distance

17. The dimension of capacitance is:

[ML²T⁻²]

[M⁻¹L⁻²T⁴A²]

[M⁻¹L⁻¹T²A²]

[ML²T⁻³A⁻²]

18. What is the unit of electric charge?

Coulomb

Newton

Tesla

Joule

19. What does a dielectric constant represent?

The energy loss

The force between charges

Ratio of charge to voltage

Ratio of permittivity of medium to vacuum

20. When a capacitor is connected to a DC battery, it:

Blocks the current after full charge

Allows continuous current

Acts as resistor

Discharges immediately

21. A capacitor is said to be fully charged when:

Its plates are neutral

It explodes

The current through it becomes zero

It stops storing energy

22. Coulomb’s law in a material medium is modified by:

Permittivity of the medium

Current

Temperature

Charge mass

23. What is the function of a dielectric in a capacitor?

Increases capacitance by reducing electric field

Makes capacitor an insulator

Decreases capacitance

Prevents electric field

24. Two like charges placed close to each other will:

Repel

Attract

Remain stationary

Cancel each other

25. What is the direction of electric field inside a capacitor?

From neutral point to negative plate

From higher to lower potential

Along circular path

From lower to higher potential

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26. If a 5 μF capacitor is charged to 10 V, energy stored is:

500 mJ

250 J

2.5 mJ

50 mJ

27. Which one is a scalar quantity?

Electric field

Electric potential

Electric flux

Electric force

28. A capacitor allows AC but blocks DC because:

DC charges it fully and stops

It is a conductor

AC is high frequency

AC heats it

29. When a capacitor is short-circuited, what happens?

No change

It charges fully

It stores maximum energy

It discharges instantly

30. Which quantity remains conserved in charging a capacitor?

Potential

Charge

Mass

Energy

31. What is the relation between charge and potential?

C = Q²/V

C = VQ

Q = CV

V = CQ

32. A capacitor can store more charge if:

Distance between plates increases

Dielectric constant increases

Plate area decreases

Temperature decreases

33. A capacitor stores:

Resistance

Current

Electric charge

Magnetic field

34. Electric field due to an infinite sheet of charge is:

Varies with distance

Zero

Maximum at edges

Constant everywhere

35. A 100 V potential difference is applied across a 2 μF capacitor. The charge stored is:

0.2 C

100 μC

200 μC

2 C

36. What determines the amount of charge a capacitor can store?

Temperature

Resistance

Capacitance and applied voltage

Electrode material

37. When a dielectric slab is inserted in a charged isolated capacitor, its potential:

Becomes zero

Increases

Remains same

Decreases

38. According to Coulomb's law, the force between two charges is:

Directly proportional to the square of distance

Inversely proportional to the square of distance

Not dependent on distance

Inversely proportional to the product of charges

39. Electric field inside a charged conductor is:

Depends on charge

Infinite

Maximum

Zero

40. During capacitor charging, current:

Becomes zero at the start

Decreases with time

Remains constant

Increases with time

41. Energy stored in a capacitor is:

½ CV²

Both A and C

Q²/2C

42. Capacitance of a conductor is increased by:

Increasing its surface area

Reducing its density

Increasing its potential

Decreasing its charge

43. Between two oppositely charged parallel plates, the electric field is:

Zero

Uniform

Circular

Radial

44. The work done in moving a unit charge from infinity to a point is:

Capacitance

Electric force

Electric field

Electric potential

45. Capacitance of a parallel plate capacitor depends on:

Resistance

Distance and area

Magnetic field

Temperature

46. What happens to energy stored when a charged capacitor is disconnected and its plates are separated?

Becomes infinite

Increases

Decreases

Remains constant

47. What is the SI unit of electric potential?

Ampere

Volt

Coulomb

Ohm

48. Electric potential at the center of two equal opposite point charges is:

Zero

Infinite

Positive

Negative

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Mustansar KhanLast Updated: May 26, 2025

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MDCAT Physics Electrostatics Test Online

Physics Electrostatics MCQS Online Test

MDCAT Physics Electrostatics Chapter Online Test

Physics Electrostatics Chapter Online Test

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Physics Electrostatics MCQS Online Test

MDCAT Physics Electrostatics Chapter Online Test

Physics Electrostatics Chapter Online Test

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