In an experiment, electrons are accelerated from rest by applying a voltage of 500 V. Calculate the radius of the path if a magnetic field of 100 mT is then applied. [Charge of the electron = 1.6×10−19 C, Mass of the electron = 9.1×10−31 kg]
a. 7.5×10−3 m
b. 7.5×10−2 m
c. 7.5 m
d. 7.5×10−4 m