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A uniform magnetic field acts at right angles to the direction of motion of electron. As a result, the electron moves in a circular path of radius 2cm. If the speed of electron is doubled, then the radius of the circular path will be

(a) 2.0 cm

(b) 0.5 cm

(c) 4.0 cm

(d) 1.0 cm

Amit Saxena , 12 Years ago
Grade upto college level
anser 1 Answers
Navjyot Kalra

(c)

 As v is doubled, the radius also becomes double.

Hence radius = 2 × 2 = 4 cm  

Last Activity: 12 Years ago
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