is kept rotating with a constant angular speed w in a vertical plane about a...
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is kept rotating with a constant angular speed w in a vertical plane about a horizontal axis at the end O The free end A is arranged to slide without friction along a fixed conducting circular ring in the same plane as that of rotation A uniform and constant magnetic induction B is applied perpendicular and into the plane of rotation as shown in figure An inductor L and an external resistance R are connected through a switch S between the point O and a point on the ring to form an electrical circuit Neglect the resistance of the ring and the rod Initially the switch is open What is the induced emf across the terminals of the switch i Obtain an expression for the current as a function of time after switch S is closed ii Obtain the time dependence of the
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