A permanent magnet
Attracts all substances
Attracts only magnetic substances
Attracts magnetic substances and repels all non-magnetic substances
Attracts non-magnetic substances and repels magnetic substances
The current is flowing through solenoid, then solenoid acting as what ?
The magnetic induction in air at a distance $d$ from an isolated point pole of strength $ m$ unit will be
A bar magnet of magnetic moment $3.0\, A-m^2$ is placed in a uniform magnetic induction field of $2 \times 10^{-5}\, T$. If each pole of the magnet experiences a force of $6 \times 10^{-4} \,N$, the length of the magnet is.....$m$
The $ S.I.$ unit of magnetic permeability is
A magnetic needle suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane because of the restoring force originating mainly from