Prepare for NEET Physics Electrostatic Potential And Capacitance (Energy Stored In A Condenser) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert explanations to quantify electrical energy storage.
NEET Questions / Physics / Electrostatic Potential And Capacitance / Energy Stored In A Condenser
A parallel plate capacitor with capacitance C is charged to a potential V. The battery is then disconnected. If the distance between the plates is doubled, and a dielectric slab of dielectric constant K=2 is inserted between the plates, filling the entire space, how does the energy stored in the capacitor change?
The energy stored in the capacitor is halved.
The energy stored in the capacitor is doubled.
The energy stored in the capacitor does not change.
The energy stored in the capacitor is quadrupled.
A capacitor of capacitance C is charged to a potential V and then connected to an uncharged capacitor of capacitance 2C. What is the final energy stored in the system?
(1/2)CV^2
(1/3)CV^2
(1/6)CV^2
(2/3)CV^2
A spherical capacitor with inner radius 'a' and outer radius 'b' is filled with a dielectric whose dielectric constant varies with radius 'r' as , where is a constant. What is the capacitance of this capacitor?
(4πε₀αa²b²)/(b²-a²)
(8πε₀αa²b²)/(b²-a²)
(4πε₀αab)/(b-a)
(8πε₀αab)/(b-a)
A parallel plate capacitor is charged to a potential difference V. The energy stored in the capacitor is U. If the potential difference is doubled, the energy stored becomes:
U/2
2U
4U
U
The energy stored in a capacitor is 0.04 J. If the capacitance is 20 μF, the voltage across the capacitor is:
20 V
40 V
63.25 V
80 V
The energy stored in a capacitor with capacitance C and voltage V is U. If the voltage is kept constant and the capacitance is doubled, the new energy stored will be:
U/2
U
2U
4U
A capacitor stores energy due to:
The kinetic energy of the charges
The potential difference across the plates
The movement of charges through the dielectric
The electric field between the plates
