T4A: Names of electrical units, DC and AC, what is a radio signal, conductors and insulators, electrical components
T4A01:
Electrical current is measured in which of the following units?
Amperes
Volts
Watts
Ohms
T4A02:
Electrical Power is measured in which of the following units?
Watts
Volts
Ohms
Amperes
T4A03:
What is the name for the flow of electrons in an electric circuit?
Current
Voltage
Resistance
Capacitance
T4A04:
What is the name of a current that flows only in one direction?
A direct current
An alternating current
A normal current
A smooth current
T4A05:
What is the standard unit of frequency?
The Hertz
The megacycle
One thousand cycles per second
The electromagnetic force
T4A06:
How much voltage does an automobile battery usually supply?
About 12 volts
About 30 volts
About 120 volts
About 240 volts
T4A07:
What is the basic unit of resistance?
The ohm
The volt
The watt
The ampere
T4A08:
What is the name of a current that reverses direction on a regular basis?
An alternating current
A direct current
A circular current
A vertical current
T4A09:
Which of the following is a good electrical conductor?
Copper
Glass
Wood
Rubber
T4A10:
Which of the following is a good electrical insulator?
Glass
Copper
Aluminum
Mercury
T4A11:
What is the term used to describe opposition to current flow in ordinary conductors such as wires?
Resistance
Inductance
Counter EMF
Magnetism
T4A12:
What instrument is used to measure the flow of current in an electrical circuit?
Ammeter
Frequency meter
SWR meter
Voltmeter
T4A13:
What instrument is used to measure Electromotive Force (EMF) between two points such as the poles of a battery?
Voltmeter
Magnetometer
Ammeter
Ohmmeter
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