If W be the amount of heat produced in the process of charging an uncharged capacitor then the amount of energy stored in it is
(1) 2W
(2)
(3) W
(4) zero
A metallic sphere of capacitance , charged to electric potential is connected by a metal wire to another metallic sphere of capacitance charged to electric potential . The amount of heat produced in connecting the wire during the process is:
1.
2.
3.
4. zero
In the circuit shown in figure, energy stored in 6 capacitor will be:
1. | \(48 \times10^{-6}~ \mathrm J\) | 2. | \(32 \times10^{-6}~ \mathrm J\) |
3. | \(96 \times10^{-6}~ \mathrm J\) | 4. | \(24 \times10^{-6}~ \mathrm J\) |
The dimension of (1/2) : permittivity of free space; E: electric field) is
(1) MLT–1
(2) ML2L–2
(3) ML–1T–2
(4) ML2T–1
The capacity of a condenser is 4 × 10–6 farad and its potential is 100 volts. The energy released on discharging it fully will be -
(1) 0.02 Joule
(2) 0.04 Joule
(3) 0.025 Joule
(4) 0.05 Joule
The energy stored in a condenser of capacity C which has been raised to a potential V is given by -
(1)
(2)
(3) CV
(4)
The capacity of a parallel plate condenser is C. It's capacity when the separation between the plates is halved will be?
(1) 4 C
(2) 2 C
(3)
(4)
A 6 μF capacitor is charged from 10 volts to 20 volts. Increase in energy will be
(1) 18 × 10–4 J
(2) 9 × 10–4 J
(3) 4.5 × 10–4 J
(4) 9 × 10–6 J
A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles, then
(1) The charge on the capacitor increases
(2) The voltage across the plates decreases
(3) The capacitance increases
(4) The electrostatic energy stored in the capacitor increases
A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor ?
(1) 1.5 × 10–8 Joule
(2) 2.5 × 10–7 Joule
(3) 3.5 × 10–5 Joule
(4) 4.5 × 10–2 Joule