1. Which one of the following is the unit of electric field?

2. Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to maket the net force on q to be zero, the value of Q will be :

3. If an electric dipole is kept in a uniform electric field then resultant electric force on it is :

4. The number of electron-taken out from a body to produce 1 coulomb of charge will be :

5. The work done in rotating an electric dipole in an electric field:

6. If sphere of bad conductor is given charge then it is distributed on:

7. Electric field in a cavity of metal:

8. The dielectric constant of a metal is:

9. 1 coulomb is equal to:

10. Each of the two point charges are doubled and their distance is halved. Force of interaction becomes p times, w here p is :