State the effect on the magnetic needle in Oersted’s experiment when:;
(a) the current is passed through the wire.
(b) the current through the wire is increased
(c) the current through the wire is reversed.
Ans. In Oersted’s experiment,
(a) When a current is passed through the wire, the magnetic needle gets deflected.
(b) When the current through the wire is increased, the deflection of the magenetic needle increases.
(c) When the current through the wire is reversed, the magnetic needle is deflected in the opposite direction.
