Question

Problem 21a

Answer 1

Given information

The magnetic field inside the solenoid is given as  

To determine the change in  if the diameter is doubled

Step-by-step explanation

Step 1.

We know, The magnetic field inside the solenoid is represented by where represents number of turns in solenoid, is current passing through it and is the length 

So, the magnetic field is independent of the diameter of the solenoid.