A charge flows through a 200 Ω galvanometer connected to a 400 Ω circular coil of 1000 turns wound on a wooden stick 20 mm in diameter. If a magnetic field B = 0.012 T parallel to the axis of the stick is decreased suddenly to zero, the charge is

Question

A charge flows through a 200 Ω galvanometer connected to a 400 Ω circular coil of 1000 turns wound on a wooden stick 20 mm in diameter. If a magnetic field B = 0.012 T parallel to the axis of the stick is decreased suddenly to zero, the charge is, 6.3 μC, 63 μC, 0.63 μC, 630 μC

MARKS App · Accepted Answer

q = Δ ϕ R q = N B 2 - B 1 A R = Nπ r 2 B 2 - B 1 R = 1000 × π × 10 - 4 × 0.012 - 0 200 + 400 = 6.3 × 10 - 6 C = 6.3 μC

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