A proton of constant speed enters region I of uniform magnetic field and moves in a…

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

A proton of constant speed enters region I of uniform magnetic field 0.10 T0.10\,\text{T} and moves in a semicircular path before crossing into adjacent region II where the magnetic field is 0.30 T0.30\,\text{T} in the same direction as in region I. In region II it completes a quarter of a circle before emerging. Ignoring any other forces, the ratio of the time spent in region II to that in region I is (a) 12\dfrac{1}{2} (b) 16\dfrac{1}{6} (c) 32\dfrac{3}{2} (d) 13\dfrac{1}{3}

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