Q1) What is the SI unit of electric potential?

a) Volt

b) Coulomb

c) Ampere

d) Ohm


Q2) Which of the following quantities is measured in volts?

a) Electric field

b) Electric potential

c) Electric charge

d) Electric current


Q3) The work done in bringing a unit positive charge from infinity to a point in an electric field is known as:

a) Electric field intensity

b) Electric potential

c) Electric potential difference

d) Electric flux


Q4) In which direction does electric potential decrease in an electric field?

a) Away from positive charges

b) Toward positive charges

c) Away from negative charges

d) Toward negative charges


Q5) Which of the following statements about equipotential surfaces is true?

a) Work done along an equipotential surface is zero.

b) Equipotential surfaces only exist around point charges.

c) The electric field is always perpendicular to an equipotential surface.

d) Equipotential surfaces cannot intersect each other.


Q6) The electric potential at a point due to a point charge decreases as:

a) The distance from the charge increases

b) The distance from the charge decreases

c) The magnitude of the charge increases

d) The magnitude of the charge decreases


Q7) What is the electric potential energy of a system of two charges?

a) The work required to bring one charge from infinity to the position of the other charge

b) The work done by an external force to keep the charges at a fixed separation

c) The product of the charges divided by the distance between them

d) The electric potential at the midpoint between the charges


Q8) The electric potential inside a conductor in electrostatic equilibrium is:

a) Zero

b) Constant

c) Proportional to the charge on the conductor

d) Equal to the potential at its surface


Q9) What happens to the capacitance of a parallel plate capacitor when the distance between the plates increases?

a) Increases

b) Decreases

c) Remains the same

d) Depends on the charge on the plates


Q10) The capacitance of a parallel plate capacitor depends on:

a) The area of the plates only

b) The separation between the plates only

c) Both the area of the plates and the separation between them

d) The charge stored on the plates only


Q11) What effect does inserting a dielectric material between the plates of a capacitor have on its capacitance?

a) Increases the capacitance

b) Decreases the capacitance

c) Does not affect the capacitance

d) Depends on the dielectric constant of the material

Q12) A capacitor has a capacitance of 10 microfarads. If the potential difference across it is 100 volts, what is the charge stored in it?

a) 10 C

b) 1000 C

c) 0.1 C

d) 100 C

Q13) When a dielectric is inserted between the plates of a capacitor, what happens to the electric field within the capacitor?

a) Increases

b) Decreases

c) Remains the same

d) Becomes zero


Q14) What is the relative permittivity of a vacuum?

a) 0

b) 1

c) ε

d) Infinite


Q15) The ability of a material to store electrical energy in an electric field is characterized by its:

a) Resistance

b) Capacitance

c) Inductance

d) Conductance


Q16) Which of the following materials would typically have the highest dielectric constant?

a) Vacuum

b) Air

c) Glass

d) Copper


Q17) If the potential difference across a capacitor is doubled, what happens to the charge stored on it, assuming capacitance remains constant?

a) Doubles

b) Halves

c) Quadruples

d) Remains the same


Q18) When a battery is connected to a capacitor in a circuit, initially the capacitor:

a) Charges up immediately to the full potential of the battery

b) Charges up gradually until its potential equals that of the battery

c) Does not charge up at all

d) Charges up until its potential is zero


Q19) What is the relationship between electric potential and electric field?

a) Electric potential is the negative of the electric field

b) Electric potential is the integral of the electric field

c) Electric field is the gradient of the electric potential

d) Electric field is independent of electric potential


Q20) The potential difference across a resistor in a circuit is 12 volts. If the resistance remains constant, what happens to the potential difference if the resistor is replaced with a capacitor?

a) Increases

b) Decreases

c) Remains the same

d) Depends on the capacitance of the capacitor