Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1. The ratio of the magnetic field in the interior of 2 to that in the interior of 1 is:A. 2B. 4C. 6D. 1E. 1/3

Given :

Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1.

To Find :

The ratio of the magnetic field in the interior of 2 to that in the interior of 1.

Solution :

We know, magnetic field in the interior of a solenoid is given by :

Let, length of solenoid 2 is L.

Therefore, length of solenoid 1 is 6L.

Dividing by :

Therefore, the correct answer is C. 6.

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