MHT CET Physics question
Two vertical rails are connected at the ends with a capacitor. There is a magnetic field directed horizontally. A wire of mass 'm' slides down the rails. Find the acceleration of wire given that mass 'm' = 1 kg, g = 10 ms, B = 1 T length of wire = 1 m, capacitance C = 1 farad. (The wire and the rails offer zero electrical resistance)
Answer: (C)
Solution
The capacitor charge is , so the current is and the magnetic force opposing the fall is ; hence
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