1. | stable in both A, B |
2. | stable in A, unstable in B |
3. | unstable in A, stable in B |
4. | unstable in both A, B |
1. | more. |
2. | less. |
3. | equal. |
4. | \(K\). | more or less or equal depending on the value of
A dielectric slab is inserted between the plates of an isolated charged capacitor. Which of the following quantities will remain the same?
(a) | the electric field in the capacitor |
(b) | the charge on the capacitor |
(c) | the potential difference between the plates |
(d) | the stored energy in the capacitor |
Choose the correct option:
1. (a), (b)
2. (b) only
3. (c), (a)
4. (a), (d)
A thin, metallic spherical shell contains a charge \(\mathrm{Q}\) on it. A point charge \(\mathrm{q}\) is placed at the centre of the shell and another charge \(\mathrm{q}_1\) is placed outside as it is shown in the figure. All the three charges are positive. The force on the charge at the centre is:
1. towards left
2. towards right
3. upward
4. zero
The electric field at the origin is along the positive \(x\text-\)axis. A small circle is drawn with the centre at the origin cutting the axes at points \(\mathrm A\), \(\mathrm B\), \(\mathrm C\) and \(\mathrm D\) having coordinates \((a,0),(0,a),(-a,0),(0,-a)\) respectively. Out of the points on the periphery of the circle, the potential is minimum at:
1. \(\mathrm A\)
2. \(\mathrm B\)
3. \(\mathrm C\)
4. \(\mathrm D\)
When the separation between two charges is increased, the electric potential energy of the charges:
1. | increases |
2. | decreases |
3. | remains the same |
4. | may increase or decrease |