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WorksheetsElectricity Review
Total questions: 45
Worksheet time: 53mins
Name
Class
Date
1.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
2.
12 Volt battery with two resistors in series 3 Ohms & 4 Ohms what would the current draw be
a)
2.1
b)
1.71 Amps
c)
2.4 Amps
d)
15 Amps
3.
What size resistor would produce a current flow of 5 Amps with a battery voltage of 12.6 volts
a)
60 Ohms
b)
2.52 Ohms
c)
1.71 ohms
d)
5.04 Ohms
4.
What is Ohm's Law?
a)
V=W/Q
b)
1-800-HOTLINEBLING
c)
V=IR
d)
dy/dx
5.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
6.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
7.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
8.
What is the unit of power?
a)
Watts
b)
Volts
c)
Current
d)
Ohms
9.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
10.
The movement of electrons from atom to atom in a line results in a flow of _____.
a)
amperage.
b)
electric current.
c)
electromagnetic connectors.
11.
Power is defined as the product of voltage times amperage. The equations is ___.
a)
P=I x V
b)
V+ P = I
c)
I x P = V
12.
What is the formula for resistance?
a)
V x I = R
b)
R = V/I
13.
What are the two factors that influence resistance?
a)
power and energy
b)
current and volts
14.
A path that is made for an electric current is?
a)
Static electricity
b)
conductor
c)
A circuit
d)
resistor
15.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
16.
If the voltage across the battery was 10V in this diagram. What would the voltage across each bulb be?
a)
10V
b)
5V
c)
20V
d)
0V
17.
If the current through the battery was 10A in this diagram. What would the current through each bulb be?
a)
10A
b)
5A
c)
20A
d)
0A
18.
If the current through the battery was 10A in this diagram. What would the current through each bulb be?
a)
10A
b)
5A
c)
20A
d)
0A
19.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
20.
If you increase the resistance of a circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get brighter
21.
If you decreases the resistance of a circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get brighter
22.
If you increase the voltage of a circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get dimmer
23.
If you decrease the voltage of a circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get brighter
24.
The picture shows an electrical circuit. This circuit is a series circuit because:
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
25.
This circuit has more than one loop. When one light goes out, the others stay on.
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
26.
Which statement is true?
a)
The light bulb will light up because the circuit is complete.
b)
The light bulb will light up because the circuit is broken.
c)
The light bulb will not light up because the circuit is complete.
d)
The light bulb will not light up because the circuit is broken.
27.
An electric circuit is a closed loop or pathway that allows electric charges to flow.
a)
True
b)
False
28.
Three resistors with values of R1, R2 and R3 are connected in series.
Which of the following expresses the total resistance, R1, of the three resistors?
Which of the following expresses the total resistance, R1, of the three resistors?
a)
Rt = R1 + R2 + R3
b)
Rt = 1/R1 + 1/R2 + 1/R3
c)
Rt = R1 = R2 = R3
d)
Rt = (1/R1 + 1/R2 + 1/R3
29.
Three resistors with values of 4.0 Ω, 6.0 Ω and 10.0 Ω are connected in parallel. What is their equivalent resistance?
a)
20.0 Ω
b)
7.3 Ω
c)
6.0 Ω
d)
1.9 Ω
30.
The total resistance in a parallel circuit is
a)
less than the smallest resistance
b)
equal to the average resistance
c)
equal to the sum of the resistance
d)
more than the largest resistance
31.
Does this statement best describe a parallel or a series circuit.
The total resistance is equal to the sum of the individual resistances.
The total resistance is equal to the sum of the individual resistances.
a)
Parallel circuit
b)
Series circuit
32.
Does this statement best describe a parallel or a series circuit.
Different currents flow through each resistor.
Different currents flow through each resistor.
a)
Parallel circuit
b)
Series circuit
33.
What is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
34.
What is the equation for electric power?
a)
V = IR
b)
P = IV
c)
V = I/R
d)
P = I/V
35.
What is an electromagnet?
a)
a temporary magnet made from current carrying wire around a magnetic metal core.
b)
a permanent magnet with a north and south pole
36.
In a battery.... What type of energy is converted to electrical energy?
a)
Chemical energy
b)
Solar energy
c)
Mechanical energy
d)
Electrical energy
37.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
38.
Which of the following is shown in the picture?
a)
Electromagnet
b)
Electric generator
c)
Electric motor
d)
Transformer
39.
How much does it cost to light 6 100 W light bulbs for 6 hours if the price of electrical energy is $0.09/kWh?
a)
$4.00
b)
$6.24
c)
$3.24
d)
$5.24
40.
How does flipping a switch turn a light on?
a)
It steps up the voltage
b)
It generates an electromagnetic field
c)
It opens a circuit
d)
It closes a circuit
41.
To work out the kilowatts per hour (kWh), you do the calculation = kW x hour. What is the kilowatts per hour of a 12kW oven that has been used for 2 hours?
a)
800 W
b)
12 kWh
c)
24 kWh
d)
6 kWh
42.
What direction does the charge flow in an electric circuit?
a)
Negative to positive
b)
Positive to negative
c)
Always to the left first
d)
Always to the right first
43.
In the circuit shown to the right, each light bulb receives 5 A of current. How much current is supplied by the battery?
a)
1 A
b)
5 A
c)
10 A
d)
15 A
44.
The diagram to the right shows three light bulbs connected in parallel to a 12-V battery. What is the voltage across light bulb B?
a)
1 V
b)
4 V
c)
6 V
d)
12 V
45.
A 750 Watt hairdryer is used for 15 minutes. Calculate the Kwhr used. Calculate the cost to use 15 min. every day for 1 year @ 8 cents/kwhr.
a)
$5.48
b)
$32.85
c)
$328.5
d)
$54.80
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