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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



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


Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

(c)

 As v is doubled, the radius also becomes double.

Hence radius = 2 × 2 = 4 cm  

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