The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A is:

 1 independent of the distance between the plates. 2 linearly proportional to the distance between the plates. 3 proportional to the square root of the distance between the plates. 4 inversely proportional to the distance between the plates.
Subtopic:  Capacitance |
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The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram. Then:

 1 the maximum work is required to move q in figure(iii). 2 in all four cases,the work done is the same. 3 the minimum work is required to move q in the figure(i). 4 the maximum work is required to move q in figure(ii).
Subtopic:  Equipotential Surfaces |
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A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system:-

1. Decreases by a factor of 2

2. Remains the same

3. Increases by a factor of 2

4. Increases by a factor of 4

Subtopic:  Energy stored in Capacitor |
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An electric dipole is place at an angle of ${30}^{\circ }$ with an electric field intensity 2$×{10}^{5}$ N/C. It experiences a torque equal to 4 Nm. The charge on the dipole, if the dipole length is 2 cm, is

(a) 8 mC              (b) 2 mC

(c) 5 mC              (d) 7 $\mu$

Subtopic:  Energy of Dipole in an External Field |
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A parallel-plate capacitor of area A, plate separation d, and capacitance C is filled with four dielectric materials having dielectric constants and ${k}_{4}$ as shown in the figure below. If a single dielectric material is to be used to have the same capacitance C in this capacitor, then its dielectric constant k is given by (a) $\mathrm{k}={\mathrm{k}}_{1}+{\mathrm{k}}_{2}+{\mathrm{k}}_{3}+3{\mathrm{k}}_{4}$

(b) $k=\frac{2}{3}\left({k}_{1}+{k}_{2}+{k}_{3}\right)+2{k}_{4}$

(c) $\frac{1}{k}=\frac{3}{2\left({k}_{1}+{k}_{2}+{k}_{3}\right)}+\frac{1}{2{k}_{4}}$

(d) $\frac{1}{\mathrm{k}}=\frac{1}{{\mathrm{k}}_{1}}+\frac{1}{{\mathrm{k}}_{2}}+\frac{1}{{\mathrm{k}}_{3}}+\frac{3}{2{\mathrm{k}}_{4}}$

Subtopic:  Dielectrics in Capacitors |
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A capacitor of 2 $\mu F$ is charged as shown in the figure. When the switch S is turned to position 2, the percentage of its stored energy dissipated is: 1. 20%
2. 75%
3. 80%
4. 0%

Subtopic:  Energy stored in Capacitor |
To view explanation, please take trial in the course below.
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NEET 2023 - Target Batch - Aryan Raj Singh
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A capacitor of 2 µF is charged as shown in the figure. When the switch S is turned to position 2, the percentage of its stored energy dissipated is: 1. 20%
2. 75%
3. 80%
4. 0%
Subtopic:  Energy stored in Capacitor |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh