What is the formula for capacitance in terms of charge and voltage?
a) C = Q / V
b) C = V / Q
c) C = Q × V
d) C = V² / Q
The unit of capacitance is:
a) Coulomb
b) Ampere
c) Ohm
d) Farad
Which of the following is true about the capacitance of a parallel plate capacitor?
a) It is inversely proportional to the area of the plates
b) It depends only on the material between the plates
c) It increases when the distance between the plates increases
d) It is independent of the dielectric constant
What happens to the capacitance of a capacitor when a dielectric material is inserted between the plates?
a) Capacitance decreases
b) Capacitance increases
c) Capacitance remains the same
d) Capacitance becomes zero
The dielectric constant (κ) of a material affects the capacitance of a capacitor by:
a) Increasing it
b) Decreasing it
c) Having no effect on it
d) Making it variable
If the distance between the plates of a capacitor is doubled, the capacitance will:
a) Double
b) Halve
c) Stay the same
d) Increase by a factor of four
In a parallel plate capacitor, if the area of the plates is doubled, the capacitance will:
a) Double
b) Quadruple
c) Remain the same
d) Decrease by half
Which of the following materials is commonly used as a dielectric in capacitors?
a) Copper
b) Rubber
c) Glass
d) Paper
A capacitor is charged with a 10V battery and then disconnected. What will happen to the charge on the capacitor if the distance between the plates is increased?
a) Charge increases
b) Charge decreases
c) Charge remains the same
d) Charge is zero
In a capacitor, if the potential difference is doubled and the capacitance remains the same, the stored energy will:
a) Double
b) Quadruple
c) Remain the same
d) Decrease by a factor of two
What is the effect of increasing the dielectric constant on the voltage across a capacitor when the charge is constant?
a) Voltage increases
b) Voltage decreases
c) Voltage remains constant
d) Voltage becomes zero
Which of the following factors does NOT affect the capacitance of a parallel plate capacitor?
a) Area of the plates
b) Distance between the plates
c) Dielectric material between the plates
d) Voltage applied to the plates
The capacitance of a capacitor is directly proportional to the:
a) Voltage applied
b) Area of the plates
c) Distance between the plates
d) Type of dielectric used
If the charge on a capacitor is 5C and the potential difference is 2V, what is the capacitance?
a) 2.5 F
b) 5 F
c) 10 F
d) 7.5 F
In a capacitor, if the dielectric constant is increased, the energy stored in the capacitor will:
a) Increase
b) Decrease
c) Stay the same
d) Become zero
A dielectric material inserted between the plates of a capacitor will reduce:
a) Capacitance
b) Charge
c) Electric field
d) Stored energy
The energy stored in a capacitor is given by the formula:
a) E = 1/2 × Q × V
b) E = Q × V
c) E = 1/2 × C × V²
d) E = C × V²
Which of the following would result in the highest capacitance?
a) A small area of plates and a large distance between them
b) A small area of plates and a small distance between them
c) A large area of plates and a small distance between them
d) A large area of plates and a large distance between them
The dielectric strength of a material refers to:
a) Its ability to conduct electricity
b) The maximum electric field a material can withstand without breaking down
c) Its capacity to store charge
d) Its ability to insulate electric circuits
Which of the following is NOT a characteristic of a capacitor?
a) It stores electrical energy
b) It resists changes in voltage
c) It uses a dielectric material to increase capacitance
d) It stores charge indefinitely without loss
The capacitance of a capacitor is inversely proportional to the:
a) Distance between the plates
b) Dielectric constant
c) Voltage applied
d) Charge stored
Which of the following occurs when a dielectric material is removed from a charged capacitor?
a) Capacitance increases
b) Voltage across the plates decreases
c) Stored energy increases
d) Capacitance decreases
Which of the following statements is true regarding the capacitance of a capacitor when the dielectric constant is increased?
a) Capacitance increases
b) Capacitance decreases
c) Capacitance remains the same
d) Capacitance becomes zero
What happens to the voltage across a capacitor if its capacitance is increased while the charge remains the same?
a) Voltage increases
b) Voltage decreases
c) Voltage remains constant
d) Voltage becomes zero
If a capacitor is charged to 10V and then disconnected, the energy stored in it will:
a) Increase if the distance between the plates is reduced
b) Increase if the distance between the plates is increased
c) Decrease if the dielectric material is removed
d) Remain constant regardless of changes in the capacitor
If the charge on a capacitor is doubled, the capacitance will:
a) Double
b) Quadruple
c) Stay the same
d) Decrease
