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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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Page 1 of 2

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1. What is the SI unit of electric potential?

Ampere

Ohm

Coulomb

Volt

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

Half

Four times

One-fourth

Double

3. What does a dielectric constant represent?

Ratio of permittivity of medium to vacuum

Ratio of charge to voltage

The energy loss

The force between charges

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

2.5 mJ

250 J

50 mJ

500 mJ

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

8.85 × 10⁻¹² F/m

1.60 × 10⁻¹⁹ C

3.00 × 10⁸ m/s

9.81 m/s²

6. A capacitor can store more charge if:

Distance between plates increases

Plate area decreases

Temperature decreases

Dielectric constant increases

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

Less than the smallest

Infinite

Greater than the largest

Equal to the sum

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

Along circular path

From neutral point to negative plate

From lower to higher potential

From higher to lower potential

9. Electric field inside a charged conductor is:

Zero

Depends on charge

Infinite

Maximum

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

0.2 C

200 μC

2 C

100 μC

11. What is the direction of electric field lines?

From positive to negative charge

From negative to positive

Circular

Random

12. Which quantity remains conserved in charging a capacitor?

Potential

Charge

Mass

Energy

13. Capacitance of a conductor is increased by:

Increasing its potential

Reducing its density

Decreasing its charge

Increasing its surface area

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

Infinite

Positive

Zero

Negative

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

Becomes infinite

Decreases

Increases

Remains constant

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

Temperature

Permittivity of the medium

Charge mass

Current

17. 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

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

Cancel each other

Attract

Remain stationary

Repel

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

Electric field intensity

Capacitance

Electric potential

Electric flux

20. The SI unit of capacitance is:

Henry

Farad

Volt

Ohm

21. Electric potential is defined as:

Force per unit charge

Energy per unit mass

Work done per unit charge

Charge per unit energy

22. Which one is a scalar quantity?

Electric potential

Electric field

Electric force

Electric flux

23. Capacitance formula for a parallel plate capacitor is:

C = Aε₀/d

C = V/Q

C = d/ε₀A

C = Q/V

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

Maximum at edges

Varies with distance

Zero

Constant everywhere

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

Inversely proportional to the product of charges

Inversely proportional to the square of distance

Not dependent on distance

Directly proportional to the square of distance

Page 2 of 2

26. What is an electric field?

A region where electric force is felt

A scalar quantity

The flow of electrons

A region where magnetic force is felt

27. During discharging of a capacitor, voltage:

Increases

Remains same

Becomes constant

Decreases exponentially

28. The dimension of capacitance is:

[M⁻¹L⁻¹T²A²]

[ML²T⁻³A⁻²]

[M⁻¹L⁻²T⁴A²]

[ML²T⁻²]

29. The dielectric constant of vacuum is:

Zero

Infinite

8.85 × 10⁻¹²

One

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

Blocks the current after full charge

Acts as resistor

Discharges immediately

Allows continuous current

31. What is the unit of electric charge?

Tesla

Joule

Newton

Coulomb

32. Energy stored in a capacitor is:

Q²/2C

½ CV²

Both A and C

33. What is the relation between charge and potential?

V = CQ

Q = CV

C = Q²/V

C = VQ

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

Becomes zero

Increases

Decreases

Remains same

35. A capacitor stores:

Resistance

Electric charge

Current

Magnetic field

36. Capacitance of a parallel plate capacitor depends on:

Distance and area

Temperature

Magnetic field

Resistance

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

Resistance

Electrode material

Temperature

Capacitance and applied voltage

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

The current through it becomes zero

It stops storing energy

Its plates are neutral

It explodes

39. During capacitor charging, current:

Increases with time

Decreases with time

Becomes zero at the start

Remains constant

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

Newton’s law

Gauss’s law

Ohm’s law

Coulomb’s law

41. A capacitor allows AC but blocks DC because:

AC is high frequency

AC heats it

DC charges it fully and stops

It is a conductor

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

3.0 × 10⁸ m/s

8.99 × 10⁹ N·m²/C²

9.81 m/s²

1.6 × 10⁻¹⁹ C

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

Electric force

Electric field

Capacitance

Electric potential

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

Inverse of distance

Distance

Inverse square root of distance

Square of distance

45. The unit of electric field intensity is:

N/C or V/m

Coulomb

Volt

Tesla

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

Zero

Radial

Uniform

Circular

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

It stores maximum energy

No change

It charges fully

It discharges instantly

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

Increases

Becomes zero

Remains same

Decreases

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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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