Exam Primer

# 5.3 Circuits

## Practice

B-005-03-01
What is the word used to describe how fast electrical energy is used?
Current
Power
Voltage
Resistance

B-005-03-02
If you have light bulbs marked 40 watts, 60 watts and 100 watts, which one will use electrical energy the fastest?
They will all be the same
The 40 watt bulb
The 100 watt bulb
The 60 watt bulb

B-005-03-03
What is the basic unit of electrical power?
The ampere
The volt
The watt
The ohm

B-005-03-04
Which electrical circuit will have no current?
A short circuit
An open circuit
A complete circuit
A closed circuit

B-005-03-05
Which electrical circuit uses too much current?
A short circuit
A closed circuit
An open circuit

B-005-03-06
Power is expressed in:
volts
amperes
watts
ohms

B-005-03-07
Which of the following two quantities should be multiplied together to find power?
Inductance and capacitance
Voltage and inductance
Voltage and current
Resistance and capacitance

B-005-03-08
Which two electrical units multiplied together give the unit "watts"?
Amperes and henrys
Volts and amperes

B-005-03-09
A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much:
voltage
resistance
current
power

B-005-03-10
High power resistors are usually large with heavy leads. The size aids the operation of the resistor by:
allowing higher voltage to be handled
increasing the effective resistance of the resistor
allowing heat to dissipate more readily
making it shock proof

B-005-03-11
The resistor that could dissipate the most heat would be marked:
100 ohms
2 ohms
20 watts
0.5 watt