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A mental rod AB of length l is rotated with a constant angular velocity `omega` about an axis passing through O and normal to its length . Potenial difference between ends of rod in absence of external magnetic field ( Where , `e ` = electric change) A. zeroB. `(m omega^(2)l^(2))/(4e)`C. `(m omega^(2)l^(2))/(2e)`D. `(m omega^(2)l^(2))/(8e)`

Answer» Correct Answer - B
`eV= m omega^(2)x " " rArrV= (momega^(2)X)/(e)`
`dV= (momega^(2))/(e) dx rArr V=(momega^(2))/(e).^(3//4)int_(1//4)" x dx "= (momega^(2)l^(2))/(4e)`


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