A particle is projected with a velocity (10 m/s) along y-axis from point (2, 3). Magnetic field of (3î + 4ĵ) Tesla exist uniformly in the space. Its speed when particle passes through y-axis for the third time is : (neglect gravity)
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Question

A particle is projected with a velocity (10 m/s) along y-axis from point (2, 3). Magnetic field of (3î + 4ĵ) Tesla exist uniformly in the space. Its speed when particle passes through y-axis for the third time is : (neglect gravity)

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G1 Physics · Accepted Answer

A magnetic field does no work, so the speed remains unchanged at 10 m/s regardless of the path. Hence D.