Description
A 72 ohm coil of wire is connected in series with an adjustable resistor (rheostat) whose resistance can be varied from 0 to 88 ohms. If the line potential of wire is 115 volts, what is the rheostat resistance when power taken by the coil is 90 watts?
Explanation & Answer
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Question:
A 72 ohm coil of wire is connected in series with an adjustable resistor (rheostat) whose
resistance can be varied from 0 to 88 ohms. If the line potential of wire is 115 volts, what is the
rheostat resi...
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