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Energy And Power Online Exam Quiz

Important questions about Energy And Power. Energy And Power MCQ questions with answers. Energy And Power exam questions and answers for students and interviews.

1. A 3.3 k? resistor dissipates 0.25 W. The current is

Options

A : 8.7 mA

B : 87 mA

C : 8.7 µA

D : 8.7 A

2. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is

Options

A : 0.58 Ah

B : 2.1 Ah

C : 21 Ah

D : 58 Ah

3. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

Options

A : 1.286 kWh

B : 12.85 kWh

C : 535 kWh

D : 252 kWh

4. Three hundred joules of energy are consumed in 15 s. The power is

Options

A : 2,000 W

B : 2 W

C : 20 W

D : 200 W

5. For 12 V and 40 mA, the power is

Options

A : 480 mW

B : 0.480 W

C : 480,000 µW

D : all of the above

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

Options

A : overheated

B : shorted

C : open

D : reversed

7. If it takes 400 ms to use 12,000 J of energy, the power is

Options

A : 30 kW

B : 30 W

C : 3 W

D : 300 kW

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

Options

A : 33 ?

B : 330 ?

C : both resistors

D : neither resistor

9. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

Options

A : 2 W

B : 1 W

C : 5 W

D : 0.5 W

10. When the current through a 12 k? resistor is 8 mA, the power is

Options

A : 7.68 mW

B : 768 mW

C : 7.68 W

D : 76.8 W

1. In 40 kW, there are

Options

A : 0.4 mW

B : 40,000 W

C : 400 W

D : 5,000 W

2. A half-watt is equal to how many milliwatts?

Options

A : 5,000 mW

B : 5 mW

C : 500 mW

D : 50 mW

3. A 6 V battery is connected to a 300 ? load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

Options

A : 1 h

B : 200 h

C : 2,000 h

D : 10 h

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?

Options

A : 20.16 kWh

B : 201.6 kWh

C : 2.01 kWh

D : 8.4 kWh

5. How much continuous current can be drawn from a 60 Ah battery for 14 h?

Options

A : 42.8 A

B : 428 A

C : 4.28 A

D : 4.2 A

6. Energy equals power multiplied by time.

Options

A : True

B : False

C :

D :

7. The capacity of a battery is measured in milliamperes.

Options

A : True

B : False

C :

D :

8. Power rating is related to resistance value.

Options

A : True

B : False

C :

D :

9. A resistor normally opens when it burns out.

Options

A : True

B : False

C :

D :

10. Energy is equal to power multiplied by voltage.

Options

A : True

B : False

C :

D :

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