When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is
A. overheated
B. shorted
C. open
D. reversed
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?
A. 20.16 kWh
B. 201.6 kWh
C. 2.01 kWh
D. 8.4 kWh
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is
A. 8.57%
B. 42.85%
C. 4.28%
D. 85.7%
A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
A. 0.58 Ah
B. 2.1 Ah
C. 21 Ah
D. 58 Ah
A 15 V source is connected across a 12 resistor. How much energy is used in three minutes?
A. 938 Wh
B. 0.938 Wh
C. 56.25 Wh
D. 5.6 Wh
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