Physics
What will happen to a compass needle when the compass is placed below a wire and a current is made to flow through the wire? Give a reason to justify your answer.
Related Questions
The diagram in figure shows a small magnet placed near a solenoid AB with it's north pole N near the end A. Current is switched on in the solenoid by pressing the key K.
(a) State the polarity at the ends A and B.
(b) Will the magnet be attracted or repelled? Give a reason for your answer.
State a law, which determines the direction of magnetic field around a current carrying wire.
State two ways by which the magnetic field due to a current carrying solenoid can be made stronger.
Name and state the rule by which the polarity at the ends of a current carrying solenoid is determined.