Question

when objects are charged by ______, they do not need to touch each other.
a. induction
b. conduction
c. friction
d. all of these

Explanation:

• Option A: Charging by induction involves bringing a charged object near a neutral object (without touching) to redistribute charges. So, no physical contact is needed.
• Option B: Charging by conduction requires direct contact between a charged and a neutral object to transfer charge.
• Option C: Charging by friction needs the objects to rub against each other (physical contact) to transfer electrons.
• Option D: Since conduction and friction need contact, "all of these" is incorrect.

Answer:

A. induction