BasicB-005-003-008
Which two electrical units multiplied together give the unit "watts"?
B
Answer
Transmitters, receivers, and measurements
Type
A
Amperes and henries
B
Volts and amperes
C
Farads and henries
D
Volts and farads
Answer Notes
This question tests your knowledge of the power formula (P = E x I) using units of measurement rather than variables. Because power is measured in watts, voltage in volts, and current in amperes, multiplying volts by amperes directly yields watts.
Distractors containing farads (the unit of capacitance) or henries (the unit of inductance) are incorrect because those units describe energy storage characteristics, not the direct rate of energy transfer measured by watts.
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Which of the following two quantities should be multiplied together to find power?
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A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much: