- 1(current)
Q. No.A \(12~\text{pF}\) capacitor is connected to a \(50~\text V\) battery. How much electrostatic energy is stored in the capacitor?
1. \(3.1\times10^{-8}~\text J\)
2. \(2.9\times10^{-8}~\text J\)
3. \(3.3\times10^{-8}~\text J\)
4. \(1.5\times10^{-8}~\text J\)
Subtopic: Â Energy stored in Capacitor |
 84%
Level 1: 80%+
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A parallel plate air capacitor of capacitance \(C\) is connected to a cell of emf \(V\) and then disconnected from it. A dielectric slab of dielectric constant \(K,\) which can just fill the air gap of the capacitor is now inserted in it. Which of the following is incorrect?
| 1. | The potential difference between the plates decreases \(K\) times. |
| 2. | The energy stored in the capacitor decreases \(K\) times. |
| 3. | The change in energy stored is \(\frac{1}{2}CV^{2}\left ( \dfrac{1}{K} -1\right ) \) |
| 4. | The charge on the capacitor is not conserved. |
Subtopic: Â Energy stored in Capacitor |
 73%
Level 2: 60%+
NEET - 2015
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A capacitor of \(2~\mu\text{F}\) 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. \(0\%\)
2. \(75\%\)
3. \(80\%\)
4. \(0\%\)
Subtopic: Â Energy stored in Capacitor |
 71%
Level 2: 60%+
NEET - 2016
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- 1(current)
Q. No.
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