Directions: In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
If an increasing temperature, the resistance decreases, then it is: (1) superconductor (2) semiconductor (3) insulator (4) none of theseA) 1 and 2 are correct
B) 2 and 3 are correct
C) 1 and 4 and correct
D) 1, 2 and 4 are correct
Correct Answer: B
Solution :
If on increasing temperature, the resistance decreases then temperature coefficient of resistance of material is negative, which is so for semiconductor and insulator.
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