Question

Which of the following methods can be used to
charge a metal sphere positively without touching
it? Select the most appropriate.
A
Bring a negatively charged rod near the
sphere and touch it to ground for a short
while.
B
Connect the positive terminal of a battery
and float the other end of the battery.
C
Rub it with a piece of silk.
D
Rub it with a piece of fur.​

Answer 1

Answer: A

Explanation:

By induction you can do this.

Answer 2

rub it with a piece of silk