Class 12 NEET Physics Moving Charges and Magnetism

An electron (mass 9×10−31‌kg and charge 1.6×10−19C ) moving with speed c∕100(c= speed of light) is injected into a magnetic field

→

B

of magnitude 9×10−4T perpendicular to its direction of motion. We wish to apply an uniform electric field

→

E

together with the magnetic field so that the electron does not deflect from its path. Then (speed of light c=3 ×108ms−1 )