Question

A proton and an alpha particle projected with same velocity in uniform transverse magnetic field then?

• A. Proton will have greater frequency than alpha particle
• B. Alpha particle will have greater frequency than proton
• C. Both the particles will have same frequency
• D. Their frequencies cannot be compared

Answer 1

The correct option is A Proton will have greater frequency than alpha particle

$frequency,\nu =qB/2\pi m$ where $q$ ia charge and $m$ is mass of the particle.

For proton ${\nu }_p=eB/2\pi m$

and for alpha particle ${\nu }_a=\left(2e\right)B/2\pi \left(4m\right)={\nu }_p/2$

So proton will have greater frequency.