A) in an elliptical orbit
B) in a circular orbit
C) along a parabolic path
D) along a straight line
Correct Answer: B
Solution :
If beam of electrons passes undeflected, then force due to electric field should be balanced with force due to magnetic fields\[{{F}_{4}}={{F}_{m}}\]. But if electric field becomes zero, then only force due to magnetic field exists. Under this force, the charge moves along a circle.You need to login to perform this action.
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