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Electrical Engineering - Energy and Power

@ : Home > Electrical Engineering > Energy and Power > General Questions

Exercise

"Actions speak louder than words."
- (Proverb)
1. 

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

A. 33
B. 330
C. both resistors
D. neither resistor

2. 

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

A. overheatedB. shorted
C. openD. reversed

3. 

In 0.025 W, there are

A. 25 kW
B. 0.00025 mW
C. 2,500 µW
D. 25 mW

4. 

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

5. 

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%




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