An electron -mass - 9 times 10-31- kg- charge - 1-6 times 10-19- C- moving with a velocity of 10-6m-s enters a magnetic field- If it describes a circle of radius 0-1- then strength of magnetic field must be4-5 times 10-5- T1-4 times 10-5- T5-5 times 10-5- T2-6 times 10-5- T

Question

Toppr Admin · Accepted Answer

Bqv-mv2r or-xA0-B-mvrq

An electron (mass=9×10−31kg,charge=1.6×10−19C) moving with a velocity of 106m/s enters a magnetic field. If it describes a circle of radius 0.1, then strength of magnetic field must be4.5×10−5T1.4×10−5T5.5×10−5T2.6×10−5T

Bqv=mv2r or B=mvrq

$B q v = \frac{m v^{2}}{r}$ or

$B = \frac{m v}{r q}$