AnswersCHS TN-Physical ScienceOhm's Law

Electric Circuits Answers

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Chang wants to build a circuit that will light up a bulb from a flashlight, and has a battery, switch, wire, and a light bulb.Which component would Chang use as the source of energy?

A
the battery
B
the switch
C
the wire
D
the light bulb
2
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A large cooler is filled with water, as shown below.

Question illustration
A
Opening the valve allows water to flow, just like opening a switch allows charges to flow.
B
Opening the valve stops the flow of water, but closing a switch stops the flow of charges.
C
Closing the valve stops the flow of water, but opening a switch stops the flow of charges.
D
Closing the valve allows water to flow, just like closing a switch allows charges to flow.
3

How does a parallel circuit change when a branch is added?

A
The total resistance increases, so the current in the circuit decreases.
B
The total resistance decreases, so the current in the circuit increases.
C
The total resistance increases, so bulbs shine at a lower brightness.
D
The total resistance decreases, so bulbs shine at a higher brightness.
4

A symbol from a circuit diagram is shown.

Question illustration
A
a switch
B
a light bulb
C
a wire
D
a battery
5

Patty makes a table of the symbols used for the parts of an electric circuit.

Question illustration
A
Battery
B
Switch
C
Resistor
D
Bulb
6

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.
7

Roshan describes the basic parts of an electric circuit using a shower as a model. Which part of a circuit does the water pipe represent?

A
the wire
B
the switch
C
the battery
D
the resistor
8

Which statement describes one feature of a closed circuit?

A
Charges do not flow.
B
Bulbs will not shine.
C
The circuit is broken.
D
The circuit is complete.
9

Look at the circuit diagram.

Question illustration
A
one battery, two light bulbs, and three resistors
B
one battery, two switches, and three light bulbs
C
one switch, one resistor, and three light bulbs
D
one switch, one light bulb, and three batteries
10

What symbol would best represent an electric fan speed controller in an electric circuit?

A
Option
B
Option
C
Option
D
Option

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