Find the direction of the current in the small circuit

Reference no: EM13993637

In the circuit shown in the figure below the capacitor has capacitance C = 29 μF and is initially charged to 100 V with the polarity shown. The resistor R₀ has resistance 10 Ω. At time t = 0 the switch is closed. The small circuit is not connected in any way to the large one. The wire of the small circuit has a resistance of 1.0 Ω/m and contains 26 loops. The large circuit is a rectangle 2.0 m by 4.0 m, while the small one has dimensions a = 10.0 cm and b = 20.0 cm. The distance c is 5.0 cm. (The figure is not drawn to scale.) Both circuits are held stationary. Assume that only the wire nearest the small circuit produces an appreciable magnetic field through it.

362_The figure below the capacitor has capacitance.gif

(a) Find the current in the large circuit 270 µs after S is closed.

(b) Find the current in the small circuit 270 µs after S is closed.

(d) Justify why we can ignore the magnetic field from all the wires of the large circuit except for the wire closest to the small circuit.

Reference no: EM13993637

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