NCERT Physics Class 12 Exemplar Chapter 1 Electric Charges and Fields Part 3

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Q.5 Figure shows electric field lines in which an electric dipole p is placed as shown. Which of the following statements is correct?

1. The dipole will not experience any force.

2. The dipole will experience a force towards right.

3. The dipole will experience a force towards left.

4. The dipole will experience a force upwards.

Answer: C

Q.6 A point charge , is placed at a distance from an isolated conducting plane. The field at a point on the other side of the plane is

1. Directed perpendicular to the plane and away from the plane.

2. Directed perpendicular to the plane but towards the plane.

3. Directed radially away from the point charge.

4. Directed radially towards the point charge.

Answer: A

Q.7 A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed

1. Perpendicular to the diameter

2. Parallel to the diameter

3. At an angle tilted towards the diameter

4. At an angle tilted away from the diameter.

Answer: A

One or More than One Correct Answer Type

Q.8 If over a surface, then

1. The electric field inside the surface and on it is zero.

2. The electric field inside the surface is necessarily uniform.

3. The number of flux lines entering the surface must be equal to the number of flux lines leaving it.

4. All charges must necessarily be outside the surface.

Answer: (C), (D)