The amount of positive and negative charges in a cup of water (\(250\) g) are respectively:
1. | \(1.6 \times10^9\) C, \(1.4 \times10^9\) C |
2. | \(1.4 \times10^9\) C, \(1.6 \times10^9\) C |
3. | \(1.34 \times10^7\) C, \(1.34 \times10^7\) C |
4. | \(1.6 \times10^8\) C, \(1.6 \times10^7\) C |
If \(10^9\) electrons move out of a body to another body every second, how much time approximately is required to get a total charge of \(1\) C on the other body?
1. \(200\) years
2. \(100\) years
3. \(150\) years
4. \(250\) years
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) |