Question

What is a solenoid? How does the polarity of a current-carrying solenoid (at the two ends) can be predicted?

Answer 1

Step 1: Definition of Solenoid:

A long cylindrical coil consisting of a large number of turns of an insulated wire is called a solenoid.

Step 2: By the use of the right-hand grip rule, the polarity of a current-carrying solenoid (at the two ends) can be predicted. When we hold the solenoid in our right hand thus, the curl figures curl around it in the direction of current flow and the thumb indicates the north pole of the magnet.