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

Zero

Positive

Negative

Infinite

2. The unit of electric field intensity is:

N/C or V/m

Volt

Coulomb

Tesla

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

Decreases capacitance

Prevents electric field

Makes capacitor an insulator

Increases capacitance by reducing electric field

4. Which one is a scalar quantity?

Electric potential

Electric field

Electric flux

Electric force

5. The SI unit of capacitance is:

Ohm

Farad

Volt

Henry

6. What is the SI unit of electric potential?

Coulomb

Ampere

Volt

Ohm

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

Remain stationary

Repel

Cancel each other

Attract

8. Electric field inside a charged conductor is:

Depends on charge

Infinite

Zero

Maximum

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

Capacitance

Electric field

Electric force

Electric potential

10. Energy stored in a capacitor is:

½ CV²

Q²/2C

Both A and C

11. What is the direction of electric field lines?

From positive to negative charge

Random

From negative to positive

Circular

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

9.81 m/s²

8.85 × 10⁻¹² F/m

1.60 × 10⁻¹⁹ C

3.00 × 10⁸ m/s

13. During capacitor charging, current:

Remains constant

Increases with time

Decreases with time

Becomes zero at the start

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

Blocks the current after full charge

Acts as resistor

Allows continuous current

Discharges immediately

15. During discharging of a capacitor, voltage:

Becomes constant

Decreases exponentially

Remains same

Increases

16. The dielectric constant of vacuum is:

Infinite

Zero

One

8.85 × 10⁻¹²

17. Capacitance of a parallel plate capacitor depends on:

Distance and area

Temperature

Magnetic field

Resistance

18. Capacitance of a conductor is increased by:

Increasing its surface area

Decreasing its charge

Reducing its density

Increasing its potential

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

Distance

Inverse square root of distance

Inverse of distance

Square of distance

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

Increases

Remains constant

Decreases

Becomes infinite

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

Half

Four times

Double

One-fourth

22. Capacitance formula for a parallel plate capacitor is:

C = d/ε₀A

C = V/Q

C = Aε₀/d

C = Q/V

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

Permittivity of the medium

Temperature

Charge mass

Current

24. A capacitor stores:

Current

Electric charge

Magnetic field

Resistance

25. A capacitor can store more charge if:

Dielectric constant increases

Distance between plates increases

Plate area decreases

Temperature decreases

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

Gauss’s law

Newton’s law

Coulomb’s law

Ohm’s law

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

It discharges instantly

No change

It stores maximum energy

It charges fully

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

Varies with distance

Zero

Maximum at edges

Constant everywhere

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

Electric field intensity

Capacitance

Electric potential

Electric flux

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

Along circular path

From neutral point to negative plate

From higher to lower potential

From lower to higher potential

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

Radial

Zero

Uniform

Circular

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

8.99 × 10⁹ N·m²/C²

9.81 m/s²

1.6 × 10⁻¹⁹ C

3.0 × 10⁸ m/s

33. A capacitor allows AC but blocks DC because:

AC heats it

It is a conductor

DC charges it fully and stops

AC is high frequency

34. Which quantity remains conserved in charging a capacitor?

Energy

Mass

Charge

Potential

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

250 J

2.5 mJ

500 mJ

50 mJ

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

Resistance

Electrode material

Temperature

Capacitance and applied voltage

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

Greater than the largest

Infinite

Less than the smallest

Equal to the sum

38. What is the unit of electric charge?

Coulomb

Joule

Tesla

Newton

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

Directly proportional to the square of distance

Not dependent on distance

Inversely proportional to the product of charges

Inversely proportional to the square of distance

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

It explodes

It stops storing energy

Its plates are neutral

The current through it becomes zero

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

Remains same

Increases

Becomes zero

Decreases

42. What is the relation between charge and potential?

C = VQ

Q = CV

C = Q²/V

V = CQ

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

200 μC

100 μC

0.2 C

2 C

44. The dimension of capacitance is:

[M⁻¹L⁻¹T²A²]

[ML²T⁻³A⁻²]

[M⁻¹L⁻²T⁴A²]

[ML²T⁻²]

45. What is an electric field?

A region where magnetic force is felt

A region where electric force is felt

The flow of electrons

A scalar quantity

46. Electric potential is defined as:

Charge per unit energy

Work done per unit charge

Force per unit charge

Energy per unit mass

47. What does a dielectric constant represent?

The energy loss

Ratio of permittivity of medium to vacuum

Ratio of charge to voltage

The force between charges

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

Decreases

Increases

Becomes zero

Remains same

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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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