AnswersOC27 Physical Sci-2003310-S1-Keuten-DAquinoUnit Test

Unit 6: Test Answers

25 verified answers7 views
23
Free Preview

Ohm’s law describes the relationship between which quantities?

A
voltage, resistance, and ohms
B
resistance, current, and amperes
C
current, voltage, and resistance
D
amperes, ohms, and current
24
Free Preview

Mateo makes a table of the symbols that represent the parts of an electric circuit.

Question illustration
A
Uses electrical energy
B
Provides electrical energy
C
Measures electric current
D
Controls electric current
25

Assuming a current is flowing, what increases the strength of the magnetic field of a coiled electrical wire?

A
straightening the wire
B
changing the direction of the current flow
C
adding more coils to the wire
D
stopping the current
26

Frances drew a diagram to show electromagnetic induction.

Question illustration
A
Current
B
Magnetic field
C
Solenoid
D
Force on wire
27

What happens to an iron bar when it is placed within the coils of a solenoid?

A
It induces a current.
B
It stops the current.
C
It becomes a magnet.
D
It loses its magnetism.
28

Laticia draws the diagram below to show Earth’s magnetic field.

Question illustration
A
The dashed line should be drawn in the same place as the solid line.
B
The solid line should be drawn in the same place as the dashed line.
C
The arrows to the left of Earth should point down.
D
The arrows to the right of Earth should point up.
29

In the diagram, the arrow shows the movement of electric charges through a wire connected to a battery.

Question illustration
A
a balance in electric potential
B
a balance in resistance
C
a difference in electric potential
D
a difference in resistance
30

Which lists types of materials from most conductive to least conductive?

A
insulator, semiconductor, conductor, superconductor
B
superconductor, conductor, semiconductor, insulator
C
conductor, insulator, semiconductor, superconductor
D
semiconductor, conductor, superconductor, insulator
31

Which two wire properties would provide the greatest resistance to the flow of a current?

A
short, thin
B
long, thin
C
hot, thick
D
cool, thick
32

What would decrease the resistance of wires carrying an electric current?

A
shorter wires
B
higher-temperature wires
C
darker-colored wires
D
thinner wires
33

The diagram shows two charged objects, X and Y.

Question illustration
A
X: positiveY: negative
B
X: negativeY: neutral
C
X: negativeY: neutral
D
X: positiveY: positive
34

What is the resistance of a light bulb if a potential difference of 120 V will produce a current of 0.5 A in the bulb?

A
0.0042
Option A
B
0.5
Option B
C
60
Option C
D
240
Option D
35

What is the main disadvantage of parallel circuits?

A
Any break in the circuit stops the flow of charges.
B
There are multiple paths for charges to flow.
C
If one bulb goes out, the other bulbs will go out.
D
They are complicated to design and build.
36

Which change increases the electric force between objects?

A
Two neutral objects are moved closer together.
B
Electrons are added to two negatively charged objects.
C
Two oppositely charged objects are moved farther apart.
D
The charge on two positively charged objects is reduced.
37

Compact fluorescent lightbulbs (CFLs) cost more than incandescent lightbulbs and have lower wattages than incandescent bulbs.

A
CFLs use the same amount of energy as incandescent lights, but they last much longer and do not need to be replaced as often.
B
CFLs use more energy as a result of the lower wattages, but electric companies charge less for energy used in CFLs.
C
CFLs will cost less to run in the long term because they use less energy than the incandescent bulbs as a result of the lower wattage.
D
CFLs will cost less to run in the long term because they are brighter and would need to be on for fewer hours.
38

Which factors affect the strength of the electric force between two objects?

A
the mass of the objects and the distance between the objects
B
the amount of charge on the objects and the type of charge on the objects
C
the distance between the objects and the amount of charge on the objects
D
the mass of the objects and the amount of charge on the objects

Did you find these answers helpful?

More from this Course

Quiz
25 verified answers

Unit 4: Test

Quiz
25 verified answers

Unit 5: Test

Quiz
24 verified answers

Test

Unit 6: Test Answers — OC27 Physical…