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
If a positive charge is shifted from a low-potential region to a high-potential region, the electric potential energy:
1. | increases |
2. | decreases |
3. | remains the same |
4. | may increase or decrease |
Consider the situation of the figure. The work done in taking a point charge from \(\mathrm{P}\) to \(\mathrm{A}\) is \(W_{\mathrm{A}}\) , from \(\mathrm{P}\) to \(\mathrm{B}\) is \(W_{\mathrm{B}}\) and from \(\mathrm{P}\) to \(\mathrm{C}\) is \(W_{\mathrm{C}}\). Then:
1. | \(W_{\mathrm{A}}<W_{\mathrm{B}}<W_{\mathrm{C}}\) | 2. | \(W_{\mathrm{A}}>W_{\mathrm{B}}>W_{\mathrm{C}}\) |
3. | \(W_{\mathrm{A}}=W_{\mathrm{B}}=W_{\mathrm{C}}\) | 4. | none of these |
Which of the following quantities do not depend on the choice of zero potential or zero potential energy?
(a) potential at a point
(b) potential difference between two points
(c) potential energy of a two-charge system
(d) change in potential energy of a two-charge system.
Choose the correct option:
1. (a) only
2. (b), (c)
3. (b), (d)
4. (a), (d)