A small electric generator is composed of a spinning coil of wire with area 0.5

Question

A small electric generator is composed of a spinning coil of wire with area 0.5 m2 and 35 loops of wire. The coil spins in a uniform magnetic field with magnitude 0.2 T such that the axis of the coil's rotation is perpendicular to the direction of the field. The coils spins with a frequency of 95 cycles per second. What is the maximum induced EMF in the coil? Submit Answer Tries 0/4 If the generator is connected to a device with an internal resistance of 340 , what is the maximum current that the generator can supply to this device? Submit Answe Tries 0/4 What is the maximum power used by the device? Submit Answer Tries 0/4 What is the maximum mechanical power that must go into spinning the coil? Submit AnswerTries 0/4

Explanation / Answer

1) Maximum induced emf = N*B*A*2*pi*f

Putting all the given values, we get

Induced emf = 35*0.2*0.5*2*pi*95

Induced emf = 2089.2 Volts

B) From ohm's law, V = I*R

I = V / R = 2089.2 / 340 = 6.1445 Amps

c) P = I2*R = 12,837 Watts.

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