A compass needle is placed near a current carrying wire. State your observation for the following cases, and give reasons for the same in each case.
(a) The magnitude of electric current in the wire is increased
(b) The compass needle is displaced away from the wire. ( CBSE 2009)
(a) Observation: Deflection of the needle increases
Reason: Magnetic field strength due to current carrying wire increases as current in the wire increases, i.e B α I.
( b)The deflection in the compass needle decrease as its displacement from the current carrying wire increase.
Reason: Strength of magnetic field reduces with the increase in distance from the wire as
Reason: Magnetic field strength due to current carrying wire increases as current in the wire increases, i.e B α I.
( b)The deflection in the compass needle decrease as its displacement from the current carrying wire increase.
Reason: Strength of magnetic field reduces with the increase in distance from the wire as
AI is thinking…
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.