Question

Part A (Figure 1) shows a circuit with an area of 0.070 m2 containing a R=1.02 resistor and a C = 220 uF uncharged capacitor. Pointing into the plane of the circuit is a uniform magnetic field of magnitude 0.10 T. In 1.0 x 10-2 s the magnetic field strengthens at a constant rate to become 0.80 T pointing into the plane. What maximum charge (sign and magnitude) accumulates on the upper plate of the capacitor in the diagram? Express your answer to two significant figures and include appropriate units. μΑ ? Value Units Submit Request Answer Figure < 1 of 1 Provide Feedback Next > X www R X

Answer 1

induced emf in the loop, emf = A*dB/dt

= 0.07*(0.8 - 0.1)/(1*10^-2)

= 4.9 V

charge on the capacitor plates, Q = C*emf

= 220*10^-6*4.9

= 0.001078 C

= 1.1*10^-3 C

here induced current flows in counter clockwise direction.

so, upper plate should have positive charge

so, Q = 1.1*10^-3 C <<<<<<<------------Answer