Electric Circuits Answers
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A large cooler is filled with water, as shown below.
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.2
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Look at the circuit diagram.
A
one battery, two light bulbs, and three resistorsB
one battery, two switches, and three light bulbsC
one switch, one resistor, and three light bulbsD
one switch, one light bulb, and three batteries3
What symbol would best represent an electric fan speed controller in an electric circuit?
A
OptionB
OptionC
OptionD
Option4
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 and are used up at the switch.B
The electric charges move from the energy source and are used up at the buzzer.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 through the buzzer and back to the energy source.5
A symbol from a circuit diagram is shown.
A
a switchB
a light bulbC
a wireD
a battery6
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.7
Which device provides electrical energy to run an electric circuit?
A
the wireB
the switchC
the batteryD
the light bulb8
Jamal draws the circuit diagram shown.
A
one battery, two switches, two resistorsB
two batteries, three switches, two resistorsC
one battery, four switches, one resistorD
two batteries, three switches, two resistors9
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 wireB
the switchC
the batteryD
the resistor10
Patty makes a table of the symbols used for the parts of an electric circuit.
A
BatteryB
SwitchC
ResistorD
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