A point positive charge is brought near an isolated conducting sphere (figure). The electric field is best given by:

1.                        2.

3.                   4. 

A point charge +q is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is:

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.

The electric field at a point is:
 

1. (a, b)

2. (b, d)

3. (c, d)

4. (a, d)