If a diamagnetic substance is brought near south or north pole of a bar magnet it is a. Attracted by the poles b. Repelled by the polesc. Attracted by north pole and repelled by south pole d. Attra...
Answer is B.
Explain why a current carrying solenoid tends to contract.
Current carrying selonoid tends to contract because when current flows through a solenoid, the currents in the various turns of the solenoid are parallel and in the same direction. Since the currents flowing through parallel wires in the same direction lead to force of attraction between them, the turns of the solenoid will also attract each other and as a result the solenoid tends to contract.