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Question

Assertion :A charged particle is moving in a circle with constant speed in uniform magnetic field.If we increase the speed of particle to twice,its acceleration will become four times. Reason: In circular path of radius R with constant speed v,acceleration is given by v2R.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is D Both Assertion and Reason are incorrect
Rv,
By increasing in the speed two times radius also becomes two times.
Hence accleration (=v2/R) will also become only two times.

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