Question

(b) Fig. 7. 2 shows a metal sphere on an insulating support.

C

Fig. 7. 2

A student has available two rods, one charged positively and one charged negatively. Using

one of these rods, she gives the sphere a uniform negative charge by induction

State which rod she chooses, and describe the procedure she follows.

Answer 1

The rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.

Charging by induction

Charging an object by induction is a process of inducing a charge on the object by bringing another charged object close to it.

Charge on the sphere

When a positively charged rod is brought near a neutral sphere (equal negative and positive charge),  the positive charge of the rod will repel the positive charge of the sphere, leaving the sphere with excess negative charge.

Thus, the rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.

Learn more about charging by induction here: https://brainly.com/question/8418256