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Unit 5 Practice-SPS 10

Total questions: 85

Worksheet time: 3hrs 7mins

Name
Class
Date
1.

A student is planning an experiment using a nail, wire, and a battery to investigate the factors that affect and do not affect the strength of an electromagnet. Which factor would NOT affect the strength of the electromagnet?

a)

the kind of metal used for the nail in the electromagnet

b)

the amount of current flowing through the electromagnet

c)

the number of coils of wire used in the electromagnet

d)

the direction of the current flowing through the electromagnet

2.

A student creates an electromagnetic wave and then reverses the direction of the current. Which of the following will happen to the magnetic field?

a)

The direction of the magnetic field will reverse.

b)

The magnetic field will expand.

c)

The magnetic field will be cancelled out and disappear.

d)

The magnetic field will cause the voltage of the battery to be reduced.

3.

The diagram to the left shows three light bulbs connected in a parallel circuit with an open switch. Which light bulb will be turned off by the opened switch?

a)

Light bulb 1

b)

Light bulb 2

c)

Both light bulbs 2 and 3

d)

Both light bulbs 1 and 2

4.

Three light bulbs are connected in a series, as shown in the diagram. After the circuit is completed, the middle light bulb breaks. What will happen to the remaining light bulbs?

a)

Both of the remaining light bulbs will go out.

b)

Both of the remaining light bulbs will stay lit.

c)

Only the light bulb closest to the positive end of the battery will stay lit.

d)

Only the light bulb closest to the positive end of the battery will go out.

5.

The relationship between voltage (V), current (I), and resistance (R) is shown in the equation. V= IR Which of the following graphs BEST represents the relationship between current and voltage when the resistance remains constant?

a)

b)

c)

d)

6.

What happens to the current flowing through a circuit as resistance increases?

a)

It increases.

b)

It decreases.

c)

It stays the same.

d)

It reverses direction.

7.

What is a measure of how much work is needed to move a charge from one point to another?

a)

amperage

b)

resistance

c)

electric current

d)

voltage

8.

What is the current flowing through a 120 volt toaster that has a resistance of 24 ohms?

a)

0.20 amperes

b)

5.0 amperes

c)

24 amperes

d)

96 amperes

9.

The diagram shows four different circuits. Which circuit will stop producing light if one bulb burns out?

a)

Circuit 1

b)

Circuit 2

c)

Circuit 3

d)

Circuit 4

10.

Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of the following would increase the strength of the magnetic field produced?

a)

Doubling the number of times the wire wraps around the nail.

b)

Changing the battery to a 3.0V battery.

c)

Reversing the direction of the current flow.

d)

Replacing the iron nail with one made of plastic.

11.

There are 3.0 amps of current flowing through a 12 volt battery in a circuit. How many amps will flow through the circuit if the resistance in the circuit is reduced by half?

a)

1.5 amps

b)

3.0 amps

c)

6.0 amps

d)

12 amps

12.

Which term BEST describes the ratio of the potential difference to the current in a conductor?

a)

resistance

b)

charge

c)

conductivity

d)

power

13.

A 110V wall outlet has a resistance of 3.7 ohms. What is the amount of current flowing to the outlet?

a)

0.04 A

b)

29.7 A

c)

113.7 A

d)

407.0 A

14.

How many amperes of current will flow through a circuit that has 4.0 ohms of resistance and is powered by a 16 volt battery?

a)

0.25 amps

b)

4.0 amps

c)

12 amps

d)

64 amps

15.

A 4.0 ohm resistor is connected to a 12 volt battery in the circuit shown below. What will happen to the current if the 12 volt battery is replaced with a 6.0 volt battery?

a)

It will remain the same.

b)

It will double.

c)

It will be halved.

d)

It will quadruple.

16.

A car radio with a resistance of 15 ohms draws a current of 0.87 amperes. What is the voltage of the car battery?

a)

1.3 volts

b)

5.8 volts

c)

13 volts

d)

17 volts

17.

If the length of a copper wire is reduced by half, what happens to the resistance of the wire?

a)

It is quartered.

b)

It is halved.

c)

It stays the same.

d)

It is doubled.

18.

What is a disadvantage of using a series circuit?

a)

If one section of the circuit fails, the whole circuit fails.

b)

It requires a complicated pattern of wires to create.

c)

Additional power sources are not able to be added.

d)

Extra output devices increase the speed of the current.

19.

Eve makes a simple series circuit using a battery and two light bulbs. Through how many paths will the current be able to travel in her circuit?

a)

1

b)

2

c)

3

d)

4

20.

The diagram shows a simple circuit. What will happen if Bulb 1 burns out?

a)

Bulb 2 will go out because it is connected in series to Bulb 1.

b)

Bulb 2 will go out because it is connected in parallel to Bulb 1.

c)

Bulb 2 will remain lit because it is connected in series to Bulb 1.

d)

Bulb 2 will remain lit because it is connected in parallel to Bulb 1.

21.

In which kind of materials is charge most easily transferred?

a)

conductors

b)

insulators

c)

nonconductors

d)

semiconductors

22.

What is described as the flow of charged particles?

a)

electric field

b)

frictional force

c)

electric current

d)

gravitational force

23.

In a simple electric circuit, a 24-ohm resistor is connected across a 6.0-volt battery. What is the current in the circuit?

a)

0.25 A

b)

1.0 A

c)

4.0 A

d)

144 A

24.

If the potential difference across a 30.0-ohm resistor is 10.0 volts, what is the current through the resistor?

a)

0.25 A

b)

0.33 A

c)

0.50 A

d)

3.0 A

25.

A lamp has a current of 2.0 amperes at 6.0 volts. What is the resistance of the lamp?

a)

4 ohms

b)

3 ohms

c)

6 ohms

d)

12 ohms

26.

The diagram below is of a circuit. In this circuit, which bulb, when burned out, will cause all other bulbs to stop glowing?

a)

A

b)

B

c)

C

d)

F

27.

Susie is in the kitchen making brownies. She melts butter in the microwave, turns on the oven to preheat, and uses the electric mixer all at the same time. Which best explains how Susie can turn the mixer off without the other appliances turning off as well?

a)

The circuits are wired in series, and when one appliance turns off, the others can still run.

b)

The circuits are wired in parallel, and when one appliance turns off, the others can still run.

c)

The circuits are wired in series, and when one appliance turns off, the others will switch to parallel circuits for power.

d)

The circuits are wired in parallel, and when one appliance turns off, the others will switch to series circuits for power.

28.

Tomas drew a model of a parallel circuit. Using conventional flow notation, which diagram correctly shows how the current flows through the circuit?

a)

b)

c)

d)

29.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
30.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
31.
Magnets attract things made of
a)
copper
b)
iron
c)
wood
d)
plastic
32.
All magnets have 2
a)
fields
b)
colors
c)
poles
d)
all of the above
33.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
34.
Where is the strongest attraction force of the magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
35.
The space around a magnet where the force of a magnet can attract best is called__________
a)
magnetism
b)
bar magnet
c)
horseshoe magnet
d)
magnetic field
36.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
37.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
38.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
39.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
40.

What is the transfer of energy in when you plug in a motor and it spins?

a)

chemical to mechanical

b)

electrical to mechanical

c)

mechanical to electrical

d)

physical to potential

41.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
42.
The flow of electricity in a circuit-
a)
current
b)
flow
c)
circuit
43.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
44.
Two types of circuits are
a)
parallel and magnetic
b)
electromagnetic and series
c)
series and parallel
45.
The unit for current is the 
a)
Volt
b)
Ohm
c)
Electron
d)
Amp
46.
In a ________ circuit there are multiple paths for the current to take.
a)
Series
b)
Parallel
47.
In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.
a)
Series
b)
Parallel
48.
The continuous flow of electric charges through a material is called...
a)
Electric Field
b)
Electric Force
c)
Electric Current
d)
Electric Circuit
49.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
50.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
51.
What type of circuit is pictured?
a)
series
b)
parallel
52.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
53.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
54.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
55.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
56.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
57.
What is the current through a 11V bulb with a power of 99W?
a)
9W
b)
9A
c)
60V
d)
60A
58.

What voltage is needed to cause a 50A current flow through a 10Ω resistor?

a)

15V

b)

500V

c)

500 kV

d)

0.2V

59.
What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts
a)
15 Ohms
b)
4 Ohms
c)
0.3333 Ohms
d)
2 Ohms
60.
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.
61.
As resistors are added in series to a circuit, the total resistance will...
a)
increase
b)
decrease
c)
stay the same
62.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
63.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
64.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
65.

What is the definition of electrical current?

a)

The opposition to the flow of electrons

b)

The rate of flow of charge

c)

The work done on each coulomb of charge

d)

Electrons moving around

66.
Last Name, First Name
4 lines
67.
1. The measure of energy given to the charge flowing in a circuit
a)
M. voltage
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
68.
2. Material through which electric current flows easily
a)
D. conductor
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
E. current
69.
3. The build up of an electric charge on the surface of an object
a)
L. static electricity
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
70.
4. The unit of measurement for current
a)
B. amps
b)
A. alternating current
c)
C. circuit
d)
D. conductor
e)
E. current
71.
5. A path for the flow of electrons
a)
C. circuit
b)
A. alternating current
c)
B. amps
d)
D. conductor
e)
E. current
72.
6. The flow of electrons from one place to another
a)
E. current
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
73.
7. Where electrons flow in the same direction in a wire
a)
F. direct current
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
74.
8. Where electrons flow in different directions in a wire
a)
A. alternating current
b)
B. amps
c)
C. circuit
d)
D. conductor
e)
E. current
75.
9. The unit of measurement for resistance
a)
H. ohms
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
76.

Opposition to the flow of an electric current, producing heat

a)
J. resistance
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
77.

Type of circuit where there are several branching paths to the components

a)
I. parallel circuit
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
78.

The unit of measurement for voltage

a)
N. volts
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
79.

Material through which electric current cannot move easily

a)
G. insulator
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
80.

Type of circuit where the components are lined up along one path

a)
K. series circuit
b)
A. alternating current
c)
B. amps
d)
C. circuit
e)
D. conductor
81.

What resistance would produce a current of 200 amps with a voltage of 2,000 V?

a)
10 volts
b)
10 Ω
c)
400,000 volts
d)
400,000 Ω
82.

What is the current produced with a 9-V battery through a resistance of 100 Ω?

a)
0.09 Ω
b)
0.09 amps
c)
900 Ω
d)
900 amps
83.

What voltage is necessary to produce a current of 200 amps through a resistance of 100 Ω?

a)
0.5 volts
b)
0.5 amps
c)
20,000 volts
d)
20,000 Ω
84.

Using your knowledge of Ohm's Law, what happens to current as you increase voltage?

a)
current increases
b)
current decreases
c)
current is unaffected
85.

Using your knowledge of Ohm's Law, what happens to current as you increase resistance?

a)
current increases
b)
current decreases
c)
current is unaffected

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