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Standard XII

Physics

Magnetic Field Due to Finite Wire

A particle ca...

Question

A particle carrying a charge $q$ , moves with a constant angular speed $ω$ on a circular path. The radius of this path is $r$ & center is at origin, how many times does the magnetic field become zero at point $(2 r, 4 r)$

1 time

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2 times

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Never

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3 times

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Solution

The correct option is B 2 times

At two positions $\to v$ becomes parallel to position vector, at this instant, $\to B$ becomes zero.

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Similar questions

Q. A particle carrying a charge

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A particle carrying a charge q, moves with a constant angular speed ω on a circular path. The radius of this path is r & center is at origin, how many times does the magnetic field become zero at point (2r,4r)

The correct option is B 2 times At two positions →v becomes parallel to position vector, at this instant, →B becomes zero.

A particle carrying a charge $q$ , moves with a constant angular speed $ω$ on a circular path. The radius of this path is $r$ & center is at origin, how many times does the magnetic field become zero at point $(2 r, 4 r)$

The correct option is B 2 times

At two positions $\to v$ becomes parallel to position vector, at this instant, $\to B$ becomes zero.