ElectroMagnetic InductionHard
Question
Consider a metal ring kept on a horizontal plane. A bar magnet is held above the ring with its length along the axis of the ring. If the magnet is dropped freely the acceleration of the falling magnet is (g is acceleration due to gravity)
Options
A.more than g
B.equal to g
C.less than g
D.depend on mass of magnet
Solution
According to Lenz law current in loop as shown in figure due to this current, a magnetic force Fm is acted on bar magnetic if φ is the acceleration of the bar magnet then
Ma = mg - F a = g = F/m ∴ a < g
Ma = mg - F a = g = F/m ∴ a < g
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