Practice Problems

New Problems reloads the page with new variable values in all questions. You must do this after grading the test to rework it another time.
Make sure to enter your answers in the specified units .
A particular residence uses amps at 120 volts. How much power does the residence use (in watts)?

Assuming the wire from the generating plant to the house has a resistance of 90 ohms, how much potential difference will be dropped along the wire (in volts)?

What is the actual difference in potential which must be supplied by the generating plant in order for 120 volts to reach the residence?

How much power will the generating plant be producing (in watts)?

What is the efficiency of this method of power transformer (in percent)?

Once you have submitted your answers for grading by clicking the grade button, you cannot resubmit answers for the same Problem Set--you must use the 'New Problems' button first.
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