The charge on of water due to protons will be:
1. | 2. | ||
3. | 4. |
A polythene piece rubbed with wool is found to have a negative charge of Transfer of mass from wool to polythene is:
1.
2.
3.
4.
A total charge is broken in two parts and and they are placed at a distance from each other. The maximum force of repulsion between them will occur, when:
1. | |
2. | |
3. | |
4. |
Two charges C and C are repelling each other with a force of N. If each charge is given C of charge, then the value of the force will be:
1. | N (attractive) | 2. | N (repulsive) |
3. | N (repulsive) | 4. | zero |
1. | from |
2. | from |
3. | from |
4. | from |
The acceleration of an electron due to the mutual attraction between the electron and a proton when they are apart is:
1. | 2 | ||
3. | 4. |
Four charges are arranged at the corners of a square as shown in the figure. The force on a positive charge kept at the center of the square is:
1. | zero |
2. | along diagonal |
3. | along diagonal |
4. | perpendicular to the side |
Five balls numbered to are suspended using separate threads. Pairs and show electrostatic attraction, while pairs and show repulsion. Therefore ball must be:
1. positively charged
2. negatively charged
3. neutral
4. made of metal
Three charges are placed at the vertices of an equilateral triangle of side as shown in the following figure. The force experienced by the charge placed at the vertex in a direction normal to is:
1.
2.
3. zero
4.
Two small spheres each having the charge are suspended by insulating threads of length from a hook. If this arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be:
1.
2.
3.
4.