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Assertion : In an L-R series circuit in ...

Assertion : In an `L-R` series circuit in `AC`, current in the circuit will decrease with increase in frequency.
Reason : Phase difference between current function and voltage function will increase with increase in frequency.

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:
B
`I=V/Z=V/(sqrt(R^2+X_L^2))`
`=V/(sqrt(R^2+(2pifL)^2))`
with increase in frequency `I` will decrease.
`tanphi=X_L/R=(2pifL)/R`
with increase in frequency `tanphi` and therefore `phi` will increase
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