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Compute all parts of given question;
Question: A "540 W" electric heater is designed to operate from 120V lines.
Part A: What is its resistance?
Part B: What current does it draw?
Part C: At 7.0 cents per kWh, how much does it cost to operate this heater for an hour?
Part D: If the line voltage drops to 110V, what power does the heater take, in watts? (Assume that the resistance is constant, although it actually will change because of the change in temperature).
I am having a hard time understanding these questions. So if you answer please explain how you found the answers.
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There is a square with 4 charges. q3 is 3x10^-6 C and in the top left q4 is -2x10^-6 C and in the top right q2 is 2x10^-6 C and in the bottom left q1 is 4x10^-6 C and in the bottom left The distance between each charge on the outer edge of the squ..
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A coil of 12 turns and radius 10.0 cmsurrounds a long solenoid of radius 2.10cm and 1.00x103 turns/meter. Thecurrent in the solenoid changes as I = (8.00 A) sin(110 t). Find the induced emf in the 12-turn coilas a function of time t.
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