The magnetic field inside a long straight solenoid-carrying current

  1. is zero.
  2. decreases as we move towards its end.
  3. increases as we move towards its end.
  4. is the same at all points.

 

Answer

is the same at all points.

 

Explanation -  Inside a solenoid, Field lines are parallel straight lines 

It means that magnetic field is same at all points inside the solenoid

magnetic-field-in-a-solenoid.jpg

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo