An electron is moving in XY- plane, making an angle relative to the position X-axis. The specific charge of an electron is 1.758 x 10 par11 C kg-1.

An electron is moving in XY- plane, making an angle relative to the position X-axis. The specific charge of an electron is 1.758 x 10 par11 C kg-1. A uniform magnetic field of induction 0.8 Wbm-2 acts along the positive X-axis. Then the particle will pass periodically through the X-axis with a period.

a) 1.406x10par 11 s
b) 2.198x10par -11 s
c) 4.465x10par-11 s
d) 0.711x10par-11 s