If a body is charged by rubbing it, its weight:
1. | remains precisely constant. |
2. | increases slightly. |
3. | decreases slightly. |
4. | may increase slightly or may decrease slightly. |
Given below are four statements:
(a) | The total charge of the universe is constant. |
(b) | The total positive charge of the universe is constant. |
(c) | The total negative charge of the universe is constant. |
(d) | The total number of charged particles in the universe is constant. |
Choose the correct option:
1. | (a) only | 2. | (b), (c) |
3. | (c), (d) | 4. | (a), (d) |
A metallic particle having no net charge is placed near a finite metal plate carrying a positive charge. The electric force on the particle will be
1. towards the plate
2. away from the plate
3. parallel to the plate
4. zero.
A positive point charge \(Q\) is brought near an isolated metal cube.
(a) | The cube becomes negatively charged. |
(b) | The cube becomes positively charged. |
(c) | The interior becomes positively charged and the surface becomes negatively charged. |
(d) | The interior remains charge-free and the surface gets nonuniform charge distribution. |
Choose the correct option.
1. | (a) , (b) | 2. | (b) , (c) |
3. | (d) only | 4. | (a) , (d) |
A large nonconducting sheet M is given a uniform charge density. Two uncharged small metal rods A and B are placed near the sheet as shown in the figure.
(a) M attracts A
(b) M attracts B
(c) A attracts B
(d) B attracts A
Choose the correct option
1. (a) , (b)
2. (c) , (d)
3. (a) , (d)
4. All of the above
Two metal spheres of capacitances C1 and C2 carry some charges. They are put in contact and then separated. The final charges Q1 and Q2 on them will satisfy
1. \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}<\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)
2. \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}=\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)
3. \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}>\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)
4. \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}<\frac{\mathrm{C}_{2}}{\mathrm{C}_{1}}\)