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Rakesh Kumar Grade: Upto college level
        A wooden stick of length 3L is rotated about an end with constant angular velocity w (omega) in a uniform magnetict field B of perpendicular to the plane of motion. If the upper one-third of its length is coated with copper, the potential difference across the whole length of sticks?
6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

potential difference will be due to motion of one third part of length...


change in area in 1 revolution, ds = pi(3L)2-pi(2L)2 =5piL2       


angle bw magnetic field & area vector is 0 ..


flux passing through the one third part of length over 1 revolution is


@ = Bdscos0        (flux)


@ = Bds


e = d@/dt = Bds/dt =B5piL2/T


T=2pi/W


e = B5L2W/2

6 years ago
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