Canadian Basic pool, section 5-02

Basic

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Subelement 5

Basic Electronics and Theory

Section 5-02

concepts of current, voltage, conductor, insulator, resistance

5-02-01

Name three good electrical conductors.

A.
Gold, silver, wood
Correct Answer
B.
Gold, silver, aluminum
C.
Copper, aluminum, paper
D.
Copper, gold, mica

5-02-01

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5-02-02

Name four good electrical insulators.

A.
Plastic, rubber, wood, carbon
B.
Paper, glass, air, aluminum
Correct Answer
C.
Glass, air, plastic, porcelain
D.
Glass, wood, copper, porcelain

5-02-02

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5-02-03

Why do resistors sometimes get hot when in use?

A.
Their reactance makes them heat up
B.
Hotter circuit components nearby heat them up
C.
They absorb magnetic energy which makes them hot
Correct Answer
D.
Some electrical energy passing through them is lost as heat

5-02-03

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5-02-04

What is the best conductor among the following materials?

A.
carbon
B.
silicon
C.
aluminium
Correct Answer
D.
copper

5-02-04

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5-02-05

The material listed, which will most readily allow an electric current to flow, is called?

Correct Answer
A.
a conductor
B.
an insulator
C.
a resistor
D.
a dielectric

5-02-05

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5-02-06

A length of metal is connected in a circuit and is found to conduct electricity very well. It would be best described as having a:

A.
high resistance
B.
high wattage
C.
low wattage
Correct Answer
D.
low resistance

5-02-06

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5-02-07

The letter "R" is the symbol for:

A.
impedance
Correct Answer
B.
resistance
C.
reluctance
D.
reactance

5-02-07

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5-02-08

The reciprocal of resistance is:

Correct Answer
A.
conductance
B.
reactance
C.
reluctance
D.
permeability

5-02-08

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5-02-09

Voltage drop means:

Correct Answer
A.
voltage developed across the terminals of a component
B.
any point in a radio circuit which has zero voltage
C.
difference in voltage at output terminals of a transformer
D.
the voltage which is dissipated before useful work is accomplished

5-02-09

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5-02-10

The resistance of a conductor changes with:

A.
voltage
Correct Answer
B.
temperature
C.
current
D.
humidity

5-02-10

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5-02-11

The most common material used to make a resistor is:

Correct Answer
A.
carbon
B.
gold
C.
mica
D.
lead

5-02-11

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