B-005-03: Concepts of energy and power, open and short circuits
B-005-03-01:
What is the word used to describe how fast electrical energy is used?
Power
Current
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?
The 100 watt bulb
They will all be the same
The 40 watt bulb
The 60 watt bulb
B-005-03-03:
What is the basic unit of electrical power?
The watt
The ampere
The volt
The ohm
B-005-03-04:
Which electrical circuit will have no current?
An open circuit
A short circuit
A complete circuit
A closed circuit
B-005-03-05:
Which electrical circuit uses too much current?
A short circuit
A dead circuit
A closed circuit
An open circuit
B-005-03-06:
Power is expressed in:
watts
volts
amperes
ohms
B-005-03-07:
Which of the following two quantities should be multiplied together to find power?
Voltage and current
Inductance and capacitance
Voltage and inductance
Resistance and capacitance
B-005-03-08:
Which two electrical units multiplied together give the unit "watts"?
Volts and amperes
Volts and farads
Farads and henrys
Amperes and henrys
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:
power
voltage
resistance
current
B-005-03-10:
High power resistors are usually large with heavy leads. The size aids the operation of the resistor by:
allowing heat to dissipate more readily
allowing higher voltage to be handled
increasing the effective resistance of the resistor
making it shock proof
B-005-03-11:
The resistor that could dissipate the most heat would be marked:
20 watts
100 ohms
2 ohms
0.5 watt
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
