Strength of Electrostatic Force

Q.

What would happen if we touched the metal sphere on the side closer to the Van de Graaff generator?

1. The sphere gets the same charge as the Van de Graaff

2. The sphere gets the opposite charge as the Van de Graaff

3. The sphere gets discharged completely

4. None of the above

Q. The electrostatic force is

1. Very strong
2. Weak
3. Always repulsive
4. Always attractive

Q. Two charges of q & 6q are placed at some distance, force acting on q is $\overrightarrow{F}$, then force on 6q is

1. $-6\overrightarrow{F}$
2. $6\overrightarrow{F}$
3. $-\overrightarrow{F}$
4. $-\frac{\overrightarrow{F}}{6}$

Q. Two point charges of magnitude q and 3q are located at a distance 'a' in dielectric medium of dielectric constant 2. The force applied by the larger charge 3q on dielectric is $\frac{n{q}^2}{4\pi {ϵ}_o{a}^2}.$ Here n is

Q.

Suppose the spheres A and B in exercise 1.12 have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B?

Q.

Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is $6.5\times {10}^{–7}$ C? The radii of A and B are negligible compared to the distance of separation.

What is the force of repulsion if each sphere is charged double the above amount, and the distance between them is halved?

Q. (a) Two insulated charged copper spheres A and B have their centresseparated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is 6.5 × 10–7 C? Theradii of A and B are negligible compared to the distance ofseparation. (b) What is the force of repulsion if each sphere is charged doublethe above amount, and the distance between them is halved?

Q.

What would happen if we touched the metal sphere on the side closer to the Van de Graaff generator?

1. The sphere gets the same charge as the Van de Graaff

2. The sphere gets the opposite charge as the Van de Graaff

3. The sphere gets discharged completely

4. None of the above

Q. Two charges of q & 6q are placed at some distance, force acting on q is $\overrightarrow{F}$, then force on 6q is

1. $6\overrightarrow{F}$
2. $-6\overrightarrow{F}$
3. $-\frac{\overrightarrow{F}}{6}$
4. $-\overrightarrow{F}$

Q. The electrostatic force is

1. Very strong
2. Weak
3. Always attractive
4. Always repulsive