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ENERGY AND POWER

Energy and Power
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

both resistors
330
neither resistor
33

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Energy and Power
When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

open
overheated
reversed
shorted

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Energy and Power
In 0.025 W, there are

0.00025 mW
2,500 µW
25 mW
25 kW

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Energy and Power
A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?

8.4 kWh
201.6 kWh
20.16 kWh
2.01 kWh

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Energy and Power
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

85.7%
42.85%
4.28%
8.57%

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