Question

(Figure 1) shows a circuit with an area of 0.040m2 containing a R=1.0Ω resistor and a C=270μF uncharged capacitor. Pointing into the plane of the circuit is a uniform magnetic field of magnitude 0.20T. In 1.0×10−2s the magnetic field strengthens at a constant rate to become 0.90T pointing into the plane.

What maximum charge (sign and magnitude) accumulates on the upper plate of the capacitor in the diagram?

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Answer #1

soln: Emf induced in the loop e = Nape 1x Areex dB at = NAOB Txo.o4 at dB - AB = (0.90-0.20) at at at This emf is induced for. <p = 0:0 It 2xto-2 e= 5 • 64 e = 2.8 volts. o=22, e- = 4 q=ce, t= 10ezec. T=RC - 90 Дес. q = эзо яло буз. 1-е-(%) 1 4 2 15field increases Since, during interval at So, induced Current is such that it tries to decrease the flux, and hence, Current

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