AnswersFL-2003310-Physical Science CRElectric Circuits

Electric Circuits Answers

15 verified answers1 views
1
Free Preview

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.
2
Free Preview

Which statement describes an open circuit?

A
The circuit is incomplete and broken, and the lights in the circuit shine.
B
The circuit is complete and unbroken, and the lights in the circuit shine.
C
The circuit is incomplete and broken, and the lights in the circuit do not shine.
D
The circuit is complete and unbroken, and the lights in the circuit do not shine.
3

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.
4

Jamal draws the circuit diagram shown.

Question illustration
A
one battery, two switches, two resistors
B
two batteries, three switches, two resistors
C
one battery, four switches, one resistor
D
two batteries, three switches, two resistors
5

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
6

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.
7

Which would cause an electric circuit to lack a current?

A
open switch
B
closed switch
C
lighted bulbs
D
unlighted bulbs
8

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
9

A symbol from a circuit diagram is shown.

Question illustration
A
a switch
B
a light bulb
C
a wire
D
a battery
10

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.
11

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 lower brightness.
C
The rest of the bulbs continue to shine at a higher brightness.
D
The rest of the bulbs stop shining and shut off.
12

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.
13

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

A
Option
B
Option
C
Option
D
Option
14

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
15

Which device provides electrical energy to run an electric circuit?

A
the wire
B
the switch
C
the battery
D
the light bulb
16

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

Did you find these answers helpful?

More from this Course

Quiz
35 verified answers

Electric Circuits

Quiz
14 verified answers

Magnets and Magnetism

Quiz
9 verified answers

Electric Circuits