a) if the end of the solenoid wound in anticlockwise direction which pole will be generated at the end?
b) after reversing the current through solenoid if south pole of a bar magnet is brought near A. Will it attract? Explain.
Answers
Explanation:
a The end of the solenoid at which current flows in the anticlockwise direction will act as a north pole and the end where current flows in clockwise direction will act as a south pole. (b) The magnetic field produced in a current carrying solenoid is similar to that produced by a bar magnet.
b The polarity of the magnetic field (that is, which end is magnetic-north or magnetic-south) can easily be found from the Right hand thumb rule. If we hold the solenoid in our right hand, so that the fingers curl around it in the direction of the conventional current flow, then the thumb will point to the north pole of the magnet. Also, a solenoid when suspended freely aligns itself in the north-south direction, thus behaving like a bar magnet. One end of the solenoid acts like a north pole and the other end the south pole.