Questions
A uniform horizontal magnetic field B exists in the region A B C D. A rectangular loop of mass m and horizontal side / and resistance R is placed in the magnetic field as shown in fig.(4). With what
velocity should it be pushed down so that it continues to fall without acceleration ?
detailed solution
Correct option is A
According to Lenz's law, the magnetic force is given byF=B2l2VRAccording to given problem F should be equal to m g. Hence mg=B2l2VR or v=mgRB2l2Talk to our academic expert!
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A conductor rod AB moves parallel to X-axis in a uniform magnetic field, pointing in the positive X-direction. The end A of the rod gets
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