Physics – Class 12 Practice Test 1

1. A ball of 80mg mass and a 2*10^-8 charge is hung with a thread in a uniform horizontal electric field of 2*10⁴V/m. What is the angle made by the thread with vertical?

2. V/m is the unit of ______

3. Which among the following molecule is not a dipole?

4. Two point charges +4q and +q are kept at a distance of 30 cm from each other. At which point between them, the field intensity will be equal to zero?

5. A field line can diverge from and converge at the same conductor. The statement is _____

6. An electric dipole will be in stable equilibrium if the angle between the axis of the dipole and the electric field is ________

7. The amount of force exerted on a unit positive charge in an electric field is known as _____

8. Which among the following is false about electric field lines?

9. If a charge is placed outside a closed surface, flux due to that charge inside the surface will be ________

10. The electric field at a point on the perpendicular bisector of a dipole is directed ______