Question

The cyclotron frequency of an electron grating in a magnetic field of $1T$ is approximately.

• A. $28MHz$
• B. $280MHz$
• C. $2.8GHz$
• D. $28GHz$

Answer 1

The correct option is D $28GHz$

Cyclotron frequency, $v=\frac{Bq}{2\pi m}$
$\Rightarrow v=\frac{1\times 1.6\times {10}^{-19}}{2\times 3.14\times \times 9.1\times {10}^{-31}}$
$=2.79\times {10}^{10}Hz\approx 28GHz$.