Question

A compass needle is placed near a current carrying straight conductor State your observations for each of the following and give reason for the same in each case. (i) Magnitude of electric current in the wire is decreased (ii) Compass needle is brought closer to the wire (iii) Direction of current in the straight conductor is reversed

Answer 1

Answer:

(i) Detection of compass needle increases. Magnetic field strength is directly proportional to the amount of current.

(ii) Deflection of the compass needle decreases. Magnetic field strength is inversely proportional to the distance from the wire.