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Assertion: If variation in resistance du...


Assertion: If variation in resistance due to temperature is taken into consideration, then current in the circuit I and power produced across the resistance P both will decrease with time.
Reason: `V=IR` is ohm's law.

A

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C

If Assertion is true, but the Reason is false.

D

If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Resistance will increase with temperature on heating. Hence current will decrease.
further `P=V^2/R` or `Pprop1/R`
Resistance in increasing. Hence, power consumed across `R` should decrease.
`V=IR` is just an equation between `PD` across a resistance current passing through it and irt resistance. This not Ohm's law.
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