A stream of electron and protons are directed towards a narrow slit in a screen the intervening region has a uniform electric field E vertically downwards and a unifrom magnetic field B out of the plane of the as shown then

Options

A. electron and protons with speed `(|E|)/(|B|)` will pass through the slit
B. protons with speed `(|E|)/(B|)` will pass through the slit electrons of the same speed will not
C. neither electron nor protons will go through the slit irrespective of their speed
D. electron will always be deflected upwards irrespective of their speed

Answer

C, D

Explanation

Niether electrons nor protons will go throught the slit irrespective of their speed

and electron will always be deflected upwards irrespective of their speed