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Assertion : Current is passed through a ...

Assertion : Current is passed through a metallic wire, heating it red. Half of its portion is cooled by cold water jacket, then rest of the half portion become more hot.
Reason: Resistances decreases due to decrease in temperature and so current through wire increases.

A

If both assertion and reason are true and reason is the correct explantion of assertion.

B

If both assertion and reason are true and reason is not the correct explantion of assertion.

C

If assertion is false but reason is true

D

If assertion is true but reason is false.

Text Solution

Verified by Experts

The correct Answer is:
A
When half the portion of the wire is cooled, its resistance decreases due to decrease in temperature. As a result of this total resistance of circuit decrease, so current through each portion of wire increases. That is, rest of the half portion becomes more hot.
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