Choose the correct statements from the following.
A. Human and animal bodies are conductors of electricity
B. If some charge is put at a point on an insulator, it stays at the same place
C. Earth is a conductor of electricity
D. A nylon or plastic comb gets electrified on combing dry hair or on rubbing, but a metal article like a spoon does not
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A, B, C and D
Whether a charge stays where it is placed or spreads away depends on whether the material allows charges to move freely (conductor) or not (insulator).
(A) Human and animal bodies are conductors of electricity — Correct. The body contains water with dissolved salts (ions), so it conducts.
(B) If some charge is put at a point on an insulator, it stays at the same place — Correct. In an insulator the charges are not free to move, so the charge remains where it was put.
(C) Earth is a conductor of electricity — Correct. This is why connecting a body to the earth (earthing) removes its excess charge.
(D) A nylon or plastic comb gets electrified on combing dry hair or on rubbing, but a metal article like a spoon does not — Correct. Charge produced on a metal spoon held in the hand leaks to the earth through the metal and the body, both conductors. (A metal held by an insulating handle can be charged.)
NCERT (2026-27):
Conductors and Insulators – “… Metals, human and animal bodies and earth are conductors.”
Conductors and Insulators – “… In contrast, if some charge is put on an insulator, it stays at the same place.”
Conductors and Insulators – “… This property of the materials tells you why a nylon or plastic comb gets electrified on combing dry hair or on rubbing, but a metal article like spoon does not.”