A tightly -wound, long solenoid carries a current of 2.00A. An electron is found to execute a uniform circular motion inside the solenoid with a frequency of `1.00 xx 10^8 rev//s` Find the number of turns per metre in the solenoid. (`B = mu_0ni`)

Options

A. 11080 turns`//`m
B. 1640 turns`//`m
C. 1200 turns`//`m
D. 1420 turns`//`m

Answer

D