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Electric Circuits — Quiz Answers

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1
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What is the main disadvantage of parallel circuits?

A
There are multiple paths for charges to flow.
B
If one bulb goes out, the other bulbs will go out.
C
Any break in the circuit stops the flow of charges.
D
They are complicated to design and build.
2
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What symbol would best represent an electric fan speed controller in an electric circuit?

A
Image with description A short horizontal line at each end with a stack of vertical lines in the middle, which are from left to right very short, short, very short, short.
B
Image with description A short horizontal line then a zigzag then a short horizontal line.
C
Image with description A circle with an X in it.
D
Image with description A short horizontal line then a small circle then a short line pointing up at about 45 degrees then a short gap then a small circle then a short horizontal line
3

Which would cause an electric circuit to lack a current?

A
open switch
B
lighted bulbs
C
unlighted bulbs
D
closed switch
4

Which statement describes an open circuit?

A
The circuit is complete and unbroken, and the lights in the circuit shine.
B
The circuit is incomplete and broken, and the lights in the circuit shine.
C
The circuit is complete and unbroken, and the lights in the circuit do not shine.
D
The circuit is incomplete and broken, and the lights in the circuit do not shine.
5

When an electric circuit operates, a buzzer makes a sound. What happens to the electric charges in this circuit?

A
The electric charges move from the energy source through the buzzer and back to the energy source.
B
The electric charges move from the energy source and are used up at the switch.
C
The electric charges move from the buzzer through the energy source and back to the buzzer.
D
The electric charges move from the energy source and are used up at the buzzer.
6

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 wire
B
the switch
C
the battery
D
the light bulb
7

Which device provides electrical energy to run an electric circuit?

A
the switch
B
the wire
C
the battery
D
the light bulb
8

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 battery
B
the switch
C
the resistor
D
the wire
9

How do the lights in a series circuit behave when one bulb burns out?

A
The rest of the bulbs continue to shine at maximum brightness.
B
The rest of the bulbs continue to shine at a higher brightness.
C
The rest of the bulbs stop shining and shut off.
D
The rest of the bulbs continue to shine at a lower brightness.
10

Which statement describes one feature of a closed circuit?

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

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