NEET Physics Question - Electromagnetic Induction

Assertion (A): The self inductance of a solenoid can be increased by decreasing length if number of turns are fixed.

Reason (R): Self inductance of a solenoid is directly proportional to current passing through it.

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:

Self inductance of a solenoid is given by \(L = \frac{\mu_0 N^2 A}{l}\). So, Assertion (A) is true as \(L\) is inversely proportional to \(l\). Self inductance \(L\) is a property of the coil's geometry and material, not dependent on current. So, Reason (R) is false. Thus, (A) is true but (R) is false.

Rankers Physics

Self Inductance of Solenoid

Solution:

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