Question

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

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

Answer 1

Answer: (D)

Cyclotron frequency, $=v=\frac{Bq}{2\pi m}$
$\Rightarrow v=\frac{1\times .6\times {10}^{-19}}{2\times 3.14\times 9.1\times {10}^{-31}}$
$=2.79\times {10}^{10}Hz$
$=28GHz$