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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. If dielectric is inserted between plates, the capacitance:

Increases

Decreases

Remains same

Becomes zero

2. The SI unit of capacitance is:

Ohm

Farad

Henry

Volt

3. The dielectric constant of vacuum is:

Zero

One

8.85 × 10⁻¹²

Infinite

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

Along circular path

From lower to higher potential

From neutral point to negative plate

From higher to lower potential

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

Inverse square root of distance

Square of distance

Distance

Inverse of distance

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

Attract

Cancel each other

Remain stationary

Repel

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

Remains constant

Becomes infinite

Increases

Decreases

8. Capacitance formula for a parallel plate capacitor is:

C = V/Q

C = Q/V

C = Aε₀/d

C = d/ε₀A

9. What does a dielectric constant represent?

Ratio of permittivity of medium to vacuum

Ratio of charge to voltage

The force between charges

The energy loss

10. Electric field inside a charged conductor is:

Depends on charge

Infinite

Zero

Maximum

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

Maximum at edges

Constant everywhere

Zero

Varies with distance

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

8.99 × 10⁹ N·m²/C²

9.81 m/s²

3.0 × 10⁸ m/s

1.6 × 10⁻¹⁹ C

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

0.2 C

2 C

100 μC

200 μC

14. Capacitance of a parallel plate capacitor depends on:

Temperature

Magnetic field

Distance and area

Resistance

15. Electric potential is defined as:

Energy per unit mass

Charge per unit energy

Work done per unit charge

Force per unit charge

16. What is the direction of electric field lines?

From negative to positive

Circular

From positive to negative charge

Random

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

Infinite

Negative

Zero

Positive

18. What is the relation between charge and potential?

Q = CV

C = VQ

V = CQ

C = Q²/V

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

Infinite

Greater than the largest

Equal to the sum

Less than the smallest

20. What is the SI unit of electric potential?

Coulomb

Ohm

Ampere

Volt

21. A capacitor can store more charge if:

Temperature decreases

Distance between plates increases

Dielectric constant increases

Plate area decreases

22. Which one is a scalar quantity?

Electric field

Electric force

Electric flux

Electric potential

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

Electric flux

Electric potential

Electric field intensity

Capacitance

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

Charge mass

Current

Permittivity of the medium

Temperature

25. Which quantity remains conserved in charging a capacitor?

Mass

Potential

Charge

Energy

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

Electrode material

Resistance

Capacitance and applied voltage

Temperature

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

Coulomb’s law

Newton’s law

Ohm’s law

Gauss’s law

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

Increases capacitance by reducing electric field

Prevents electric field

Makes capacitor an insulator

Decreases capacitance

29. The unit of electric field intensity is:

Volt

Tesla

Coulomb

N/C or V/m

30. What is an electric field?

A region where electric force is felt

The flow of electrons

A scalar quantity

A region where magnetic force is felt

31. Energy stored in a capacitor is:

Both A and C

½ CV²

Q²/2C

32. During capacitor charging, current:

Remains constant

Decreases with time

Becomes zero at the start

Increases with time

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

Circular

Zero

Radial

Uniform

34. A capacitor allows AC but blocks DC because:

AC is high frequency

It is a conductor

AC heats it

DC charges it fully and stops

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

Inversely proportional to the square of distance

Directly proportional to the square of distance

Not dependent on distance

Inversely proportional to the product of charges

36. During discharging of a capacitor, voltage:

Increases

Decreases exponentially

Becomes constant

Remains same

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

50 mJ

2.5 mJ

500 mJ

250 J

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

Discharges immediately

Blocks the current after full charge

Allows continuous current

Acts as resistor

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

1.60 × 10⁻¹⁹ C

8.85 × 10⁻¹² F/m

3.00 × 10⁸ m/s

9.81 m/s²

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

The current through it becomes zero

Its plates are neutral

It stops storing energy

It explodes

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

Half

Four times

Double

One-fourth

42. What is the unit of electric charge?

Tesla

Coulomb

Newton

Joule

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

Electric force

Electric field

Electric potential

Capacitance

44. A capacitor stores:

Resistance

Magnetic field

Current

Electric charge

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

Decreases

Becomes zero

Increases

Remains same

46. The dimension of capacitance is:

[ML²T⁻³A⁻²]

[M⁻¹L⁻¹T²A²]

[M⁻¹L⁻²T⁴A²]

[ML²T⁻²]

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

No change

It discharges instantly

It charges fully

It stores maximum energy

48. Capacitance of a conductor is increased by:

Reducing its density

Increasing its surface area

Decreasing its charge

Increasing its potential

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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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