Growth of Current in an Inductor: Practice Problem & Solution

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Growth of Current in an Inductor. Understanding the underlying formula is key to arriving at the correct answer below:

Magnetic field inside a long solenoid is given by \(B = \mu_0 n I\), where \(n = \frac{N}{L}\) is the number of turns per unit length. Therefore, \(B = \mu_0 \frac{N}{L} I\).