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A uniform magnetic field acts right angl...

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

A

0.5 cm

B

2.5 cm

C

5.0 cm

D

7.5 cm

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PHYSICS GALAXY - ASHISH ARORA-MAGNETIC EFFECTS OF CURRENT AND MAGNETISM-Conceptual MCQ
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  11. The straight wire AB carries a current I. The ends of the wire subtend...

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  16. The magnetic field ofa U-magnet is parallel to the surface of this pap...

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  17. The figure shows the cross section of two long coaxial tubes carrying ...

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  18. An insulating rod of length I carries a charge q distrubuted uniformly...

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