Canadian Basic pool, section 5-03

Basic

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Subelement 5

Basic Electronics and Theory

Section 5-03

concepts of energy and power, open and short circuits

5-03-01

What is the word used to describe how fast electrical energy is used?

A.
Current
Correct Answer
B.
Power
C.
Voltage
D.
Resistance

5-03-01

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5-03-02

If you have light bulbs marked 40 watts, 60 watts and 100 watts, which one will use electrical energy the fastest?

A.
They will all be the same
B.
The 40 watt bulb
Correct Answer
C.
The 100 watt bulb
D.
The 60 watt bulb

5-03-02

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5-03-03

What is the basic unit of electrical power?

A.
The ampere
B.
The volt
Correct Answer
C.
The watt
D.
The ohm

5-03-03

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5-03-04

Which electrical circuit will have no current?

A.
A short circuit
Correct Answer
B.
An open circuit
C.
A complete circuit
D.
A closed circuit

5-03-04

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5-03-05

Which electrical circuit uses too much current?

A.
A dead circuit
Correct Answer
B.
A short circuit
C.
A closed circuit
D.
An open circuit

5-03-05

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5-03-06

Power is expressed in:

A.
volts
B.
amperes
Correct Answer
C.
watts
D.
ohms

5-03-06

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5-03-07

Which of the following two quantities should be multiplied together to find power?

A.
Inductance and capacitance
B.
Voltage and inductance
Correct Answer
C.
Voltage and current
D.
Resistance and capacitance

5-03-07

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5-03-08

Which two electrical units multiplied together give the unit "watts"?

A.
Volts and farads
B.
Farads and henrys
C.
Amperes and henrys
Correct Answer
D.
Volts and amperes

5-03-08

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5-03-09

A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much:

A.
voltage
B.
resistance
C.
current
Correct Answer
D.
power

5-03-09

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5-03-10

High power resistors are usually large with heavy leads. The size aids the operation of the resistor by:

A.
allowing higher voltage to be handled
B.
increasing the effective resistance of the resistor
Correct Answer
C.
allowing heat to dissipate more readily
D.
making it shock proof

5-03-10

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5-03-11

The resistor that could dissipate the most heat would be marked:

A.
100 ohms
B.
2 ohms
Correct Answer
C.
20 watts
D.
0.5 watt

5-03-11

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