In winter an iron pipe feels colder than a wooden window. This is because wood is:

(A) Conductor
(B) Non-conductor
(C) Semi-conductor
(D) None of these

Q. Which of the following is a conductor?
(A) Plastic
(B) Rubber
(C) Iron
(D) wood

Q. A material having the conductivity value falling between that of a conduction and insulator is:
(A) Semi-conductor
(B) HTLS conductor
(C) Insulator
(D) None of these

Answers:
1. (B) Non-conductor
2. (C) Iron
3. (A) Semi-conductor