The magnitude of the magnetic field due to a short bar magnet having a magnetic moment of $0.2 Am^2$, at a distance of 50 cm from the centre of the magnet on its axial line will be |
$1.2 × 10^{-7} T$ $6.4 × 10^{-7} T$ $3.2 × 10^{-7} T$ $5 × 10^{-7} T$ |
$3.2 × 10^{-7} T$ |
The correct answer is Option (3) → $3.2 × 10^{-7} T$ |