A compass needed is please near a current carrying wire state your observation for the following cases give reason for the same in each case. (I) magnitude electric current in the wire is increased (ii) the compass needle is displace away for the wier
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Deflection of Needle is propotional to the current flowing through wire.
1. when electric current in the wire is increased the the magnitude of magnetic field on the needle increases.
2.When the needle is placed away from the wire the magnitude of the magnetic force on tne needle decreases.
This was proved by Sir Hans Christian Orsted.
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