Current Electricity Charging Discharging Of Capacitors Question 23
Question: Assertion : The temperature coefficient of resistance is positive for metals and negative for p-type semiconductor. Reason : The effective charge carriers in metals are negatively charged whereas in p-type semiconductor they are positively charged.
[AIIMS 1996]
Options:
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Show Answer
Answer:
Correct Answer: B
Solution:
The temperature co-efficient of resistance for metal is positive and that for semiconductor is negative. In metals free electrons (negative charge) are charge carriers while in P-type semiconductors, holes (positive charge) are majority charge carriers.
BETA
