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WorksheetsUsing Electric Energy Section 22.2
Total questions: 10
Worksheet time: 22mins
Name
Class
Date
1.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
2.
If the Voltage stays the same and Resistance is increased, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
3.
What does power mean?
a)
Joules transferred per second
b)
Electron flow per second
c)
Speed of electrons
d)
Electron energy
4.
What is the unit of power?
a)
Ohms
b)
Volts
c)
Amps
d)
Watts
5.
Which of the following equations is an equation for power, involving current and resistance?
a)
P= I/V
b)
P = IR
c)
P = IVR2
d)
P = I2R
6.
Which of the following is an equation for power, involving voltage and resistance?
a)
P = V/R
b)
P = V2/R
c)
P = VR
d)
P = V2R2
7.
A kilowatt-hour is equal to ____________ joules.
a)
3,600
b)
360,000
c)
3,600,000
d)
360,000,000
8.
Energy equals power multiplied by time; E =Pt. If we want the energy units to be joules, and the power units are watts, what unit does the time need to be in?
a)
days
b)
hours
c)
minutes
d)
seconds
9.
If electrical power costs $0.12/kwh, and I use 250 kwh of electrical energy, what will I be charged?
a)
$10
b)
$20
c)
$30
d)
$40
10.
If electrical power costs $0.12/kwh, and I use 9 x 108 Joules of electrical energy, what will I be charged?
a)
$10
b)
$20
c)
$30
d)
$40
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