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Your friend decides to produce electrical power by turning a coil of 100,000 circular loops of wire around an axis parallel to a diameter in the Earth's magnetic field, which has a local magnitude of 0.3 G. The loops have a radius of 21 cm.
(a) If your friend turns the coil at a frequency of 160 Hz, what peak current will flow in a resistor, R = 1200 O, connected to the coil?
(b) The average current flowing in the coil will be 0.7071 times the peak current. What will be the average power obtained from this device?
q1. two ocean liners each with a mass of 38000 metric tons are moving on parallel courses 92 m apart. what is the
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Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and free. The approximation sin q = q holds for all three angles, with q3 > q2 > q1. How do the angular frequencies of th..
Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B?
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