NEET Physics Question - Alternating Current

Assertion (A): A choke coil has the characteristic of high inductance and low resistance.

Reason (R): More is the inductive property of the choke coil, Power factor of the circuit approaches maximum.

Both A & R are true and the (R) is the correct explanation of the (A)

Both A & R are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

A choke coil has high inductance and low resistance (A is true). Power factor is \(cos\phi = R/Z = R/sqrt{R^2 + X_L^2}\). Higher inductive property (large \(X_L\)) makes \(cos\phi\) approach minimum (0), not maximum. So R is false.

Rankers Physics

Choke Coil Characteristics

Solution:

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