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

From neutral point to negative plate

Along circular path

From lower to higher potential

From higher to lower potential

2. A capacitor can store more charge if:

Temperature decreases

Distance between plates increases

Plate area decreases

Dielectric constant increases

3. During discharging of a capacitor, voltage:

Remains same

Decreases exponentially

Increases

Becomes constant

4. What is the SI unit of electric potential?

Volt

Ohm

Coulomb

Ampere

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

Becomes zero

Increases

Remains same

Decreases

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

Gauss’s law

Newton’s law

Coulomb’s law

Ohm’s law

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

It discharges instantly

It charges fully

It stores maximum energy

No change

8. 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

9. What is the relation between charge and potential?

V = CQ

C = VQ

C = Q²/V

Q = CV

10. A capacitor allows AC but blocks DC because:

AC is high frequency

AC heats it

It is a conductor

DC charges it fully and stops

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

Infinite

Greater than the largest

Less than the smallest

Equal to the sum

12. The dielectric constant of vacuum is:

8.85 × 10⁻¹²

Zero

Infinite

One

13. 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

14. Which one is a scalar quantity?

Electric force

Electric flux

Electric field

Electric potential

15. Energy stored in a capacitor is:

Both A and C

Q²/2C

½ CV²

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

Temperature

Permittivity of the medium

Charge mass

Current

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

Its plates are neutral

It stops storing energy

It explodes

The current through it becomes zero

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

Half

Double

Four times

One-fourth

19. The unit of electric field intensity is:

Tesla

Volt

Coulomb

N/C or V/m

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

Attract

Remain stationary

Repel

Cancel each other

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

Zero

Infinite

Positive

Negative

22. Electric field inside a charged conductor is:

Maximum

Zero

Depends on charge

Infinite

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

2.5 mJ

50 mJ

500 mJ

250 J

24. The SI unit of capacitance is:

Ohm

Farad

Henry

Volt

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

Directly proportional to the square of distance

Not dependent on distance

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

Remains same

Becomes zero

Decreases

Increases

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

Zero

Maximum at edges

Constant everywhere

Varies with distance

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

8.85 × 10⁻¹² F/m

3.00 × 10⁸ m/s

1.60 × 10⁻¹⁹ C

9.81 m/s²

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

2 C

0.2 C

100 μC

200 μC

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

Electric field

Electric potential

Capacitance

Electric force

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

Circular

Radial

Uniform

Zero

32. What is the direction of electric field lines?

Circular

From positive to negative charge

From negative to positive

Random

33. Electric potential is defined as:

Charge per unit energy

Work done per unit charge

Force per unit charge

Energy per unit mass

34. Capacitance of a parallel plate capacitor depends on:

Temperature

Magnetic field

Distance and area

Resistance

35. During capacitor charging, current:

Becomes zero at the start

Increases with time

Remains constant

Decreases with time

36. The dimension of capacitance is:

[ML²T⁻²]

[M⁻¹L⁻¹T²A²]

[M⁻¹L⁻²T⁴A²]

[ML²T⁻³A⁻²]

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

Becomes infinite

Remains constant

Increases

Decreases

38. What does a dielectric constant represent?

The energy loss

Ratio of charge to voltage

Ratio of permittivity of medium to vacuum

The force between charges

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

Blocks the current after full charge

Acts as resistor

Discharges immediately

Allows continuous current

40. Capacitance of a conductor is increased by:

Increasing its surface area

Increasing its potential

Reducing its density

Decreasing its charge

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

Resistance

Capacitance and applied voltage

Temperature

Electrode material

42. Capacitance formula for a parallel plate capacitor is:

C = d/ε₀A

C = V/Q

C = Aε₀/d

C = Q/V

43. Which quantity remains conserved in charging a capacitor?

Energy

Charge

Potential

Mass

44. A capacitor stores:

Current

Electric charge

Magnetic field

Resistance

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

Distance

Inverse square root of distance

Inverse of distance

Square of distance

46. What is the unit of electric charge?

Newton

Coulomb

Joule

Tesla

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

Capacitance

Electric flux

Electric potential

Electric field intensity

48. 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

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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

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