Аxis S I (induced)
A simple generator can be made by attaching a square armature to the axle of your hamster’s exercise wheel, where the armature turns between the poles of a permanent magnet. You wish to use this device to operate a reading light (not shown) that requires a peak voltage of 15V and power of 25W. The magnetic field has strength B = 0.50 T, the square armature has sides of 10cm, and it contains 100 turns of wire. The bulb plus armature wire have a total resistance of 7Ω in the circuit.
a) What is the peak magnetic flux through the square armature as it turns, and at what point in the revolution does this happen?
b) ) How fast in revolutions per minute does the hamster have to run to produce the 15V peak output?(Hint: recall that ω = 2π f.)
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