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प्रश्न
A proton describes a circular path of radius 5 cm in a transverse magnetic field. If the speed of proton is doubled, then the radius of the circular path will be ____________.
पर्याय
7.5 cm
2.5 cm
5 cm
10 cm
MCQ
रिकाम्या जागा भरा
उत्तर
A proton describes a circular path of radius 5 cm in a transverse magnetic field. If the speed of proton is doubled, then the radius of the circular path will be 10 cm.
Explanation:
`"Radius r" = "mv"/"qB"`
If speed v is doubled, radius will also double.
∴ New radius = 2 x 5 = 10 cm
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