An electron is moving at a velocity of $3.2 × 10^7 m/s$ in a magnetic field along a circular path of radius 20 cm. The magnitude of the magnetic field applied is (approximately) |
$6 × 10^{-4} T$ $8.43 × 10^{-5} T$ $9 × 10^{-4} T$ $9 × 10^{-5} T$ |
$9 × 10^{-4} T$ |
The correct answer is Option (3) → $9 × 10^{-4} T$ |