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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

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.

Option: 1

2.0 cm


Option: 2

0.5 cm


Option: 3

4.0 cm


Option: 4

1.0 cm


Answers (1)

best_answer

\mathrm{ r=\frac{m v}{q B} \text { or } r \propto v }
As v is doubled, the radius also becomes double. Hence, radius = 2 x 2 = 4 cm

Posted by

Kuldeep Maurya

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