An electron has a circular path of radius 0.01 m in a perpendicular magnetic induction 10−3 T. The speed of the electron is nearly:
1.76×104m/s
1.76×106m/s
3.52×106m/s
7.04×105m/s
A
1.76×104m/s
B
1.76×106m/s
C
3.52×106m/s
D
7.04×105m/s
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Answer is B.
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