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Unit 9 Electricity (II)

Total questions: 100

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

Which part of the simple electrical circuit provides electricity?

a)

battery

b)

wire

c)

light bulb

d)

switch

2.

The ________________ is the path for electrons to flow.

a)

battery

b)

wire

c)

switch

d)

light bulb

3.

The part of the simple electrical circuit that opens or closes the circuit is the (a)   . Type your answer.

4.

An insulator allows current to pass through it easily.

a)

true

b)

false

5.

Give ONE example of an insulator. Type your answer.

(a)  

6.

A flow of electric charges is called a/an _________________

a)

electric wire

b)

battery

c)

electric current

d)

switch

7.

What THREE things are needed to make a path for negative charges to flow?

a)

battery

b)

bulb

c)

wire

d)

switch

8.

Choose the correct answer. When a switch is on, the path is complete/incomplete, so the light bulb comes on. Type your answer

(a)  

9.

Choose the correct answer. When the switch is off the path is broken, so the circuit is now open/closed. Type your answer.

(a)  

10.

Which TWO materials can be used to create light.

a)

bulb

b)

battery

c)

wire

d)

nail

11.
A correct statement of Ohm’s Law is:
a)
I= V R
b)
V ∝ I
c)
V = IR
d)
both b and c
12.

What is the unit for resistance?

a)

volts

b)

amps

c)

coulombs

d)

ohms

13.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
14.

If the battery produced 12.6 Volts and there was a 6 Ohm resistor, what would be the current?

a)

2.1 Amps

b)

2.4 Amps

c)

1.71 Amps

d)

15 Amps

15.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
16.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
17.
DC stands for ____ and is used in batteries.
a)
Distant Current
b)
Don't Current
c)
Direct Current
d)
Distributed current
18.
What happens to the current in a circuit as the resistance decreases?
a)
Current increases
b)
Current Decreases
c)
Current remains the same
19.

What unit is used to measure voltage?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

20.

What unit is used to measure current?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

21.

What unit is used to measure resistance?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

22.

Which is the right form of Ohm's Law?

a)

V=I/R

b)

V=R/I

c)

I=V/R

d)

I=R/V

23.

What is not needed in order to create a working circuit?

a)

battery (power source)

b)

lightbulb

c)

current

d)

closed circuit

24.

What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?

a)

12 V

b)

21 V

c)

4/3 V

d)

3/4 V

25.

What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?

a)

1/4 A

b)

144 A

c)

4 A

d)

0.4 A

26.

What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?

a)

1/3 ohms

b)

3 ohms

c)

27 ohms

d)

9 ohms

27.

If a circuit had 4 D-Cell batteries (each 1.5 V) and a lightbulb with resistance of 2 ohms, what is the current that flows through the circuit?

a)

2 A

b)

3 A

c)

6 A

d)

8 A

28.

What is voltage?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

29.

What is current?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

30.

What is resistance?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

31.

According to Ohm's Law, current equals the voltage divided by the _________.

a)

Resistance

b)

Inductance

c)

Capacitance

d)

Power

e)

Conductance

32.

If the current in an electrical circuit is constant, what will happen to the voltage if the resistance is increased?

a)

The voltage will decrease

b)

The voltage will increase

c)

The voltage will stay the same

33.

What is the Voltage, V in the circuit shown?

a)

6.5 V

b)

26 V

c)

0.15 V

34.

If there are 40 Volts and 5 Amps running through an electrical circuit, what is the resistance of the circuit?

a)

1 Ohm

b)

2 Ohms

c)

4 Ohms

d)

6 Ohms

e)

8 Ohms

35.

The circuit with higher resistance will allow less charge to flow, meaning the circuit with higher resistance has less current flowing through it.

a)

True

b)

False

36.

If you increase the size of the resistor and keep the voltage the same, what will happen to the current?

a)

The current will decrease

b)

The current will increase

c)

The current will stay the same

37.

When the second bulb is added, they get

a)

brighter

b)

dimmer

c)

broken

d)

cold

38.

What is the measuring device shown?

a)

bulb

b)

cell

c)

ammeter

d)

voltmeter

39.

What can you say about the current in the series circuit?

a)

it splits across the components

b)

it changes constantly

c)

it is different in different places

d)

it is the same everywhere

40.

Which component provides the energy for the charges?

a)

cell

b)

bulb

c)

switch

d)

ammeter

41.

If the ammeter says the current is 5A, what is the current flowing through one bulb?

a)

2.5A

b)

10A

c)

5A

d)

0

42.

If one bulb was broken, what would happen?

a)

current would no longer flow, so everything would be off

b)

the ammeter would measure a current from the other bulb

c)

the switch would keep the current flowing

d)

the cell would burn out and catch fire

43.

What is the name of the device which measures current?

(a)  

44.

Current is measured in

a)

Volts

b)

Watts

c)

Seconds

d)

Amps

45.

If the switch was opened, what would happen?

a)

the ammeter would measure a current flowing

b)

current would no longer flow, so everything would be off

c)

the bulbs would stay on because they're connected to the cell

d)

the bulbs would burn out and catch fire

46.

Name the charged particle, which is part of an atom, that flows in a circuit

a)

proton

b)

electron

c)

neutron

d)

elepton

47.

What causes a decrease in current?

a)

Adding another bulb

b)

increasing resistance

c)

decreasing voltage from the supply

d)

decreasing the resistance

48.

If the current flowing through the cell is 2A, what is the ammeter reading?

a)

5A

b)

1A

c)

6A

d)

2A

49.
What kind of circuit is this?
a)
series
b)
parallel
50.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
51.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
52.
When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.
a)
parallel
b)
series
c)
open
d)
closed
53.
The current has only has one loop to flow through in this circuit. 
a)
Series Circuit 
b)
Parallel Circuit 
54.
What will happen if one light bulb is removed from this circuit?
a)
The other bulbs will go out.
b)
The other bulbs will stay on
c)
The other bulbs will get dimmer.
d)
The battery will become stronger.
55.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
56.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
57.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
58.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
59.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
60.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
61.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
62.

Which item(s) in the circuit will work?

a)

light bulb

b)

buzzer

c)

battery

d)

none of the items will work

63.

Students constructed a circuit using different-colored lightbulbs. What will happen if Switch 3 is closed and the other switches are left open?

a)

Only the white bulb will operate

b)

None of the bulbs will operate

c)

Only the white and yellow bulbs will operate

d)

Only the red and blue bulbs will operate

64.
What is it called when a circuit is complete?
a)
Closed circuit
b)
Light bulb circuit
c)
Open circuit
d)
Series circuit
65.
What is the energy source for a circuit?
a)
Light bulb
b)
Battery
c)
Wire
d)
Switch
66.
What is the type of circuit that stops working when one bulb goes out?
a)
A broken circuit
b)
Parallel Circuit
c)
Series Circuit
d)
A metal circuit
67.
Mrs. Moore made a circuit. It did not light up. Why?
a)
The switch is open.
b)
The switch is closed.
68.
A series circuit has ____ path(s) that the electric current can take. 
a)
One
b)
Two 
c)
Three 
d)
Four
69.

When the second bulb is added, they get

a)

brighter

b)

dimmer

c)

broken

d)

cold

70.

What is the measuring device shown?

a)

bulb

b)

cell

c)

ammeter

d)

voltmeter

71.

What can you say about the current in the series circuit?

a)

it splits across the components

b)

it changes constantly

c)

it is different in different places

d)

it is the same everywhere

72.

If the ammeter says the current is 5A, what is the current flowing through one bulb?

a)

2.5A

b)

10A

c)

5A

d)

0

73.

If the current flowing through the cell is 2A, what is the ammeter reading?

a)

5A

b)

1A

c)

6A

d)

2A

74.

If bulb #1 in this series circuit broke, bulb #2 would

a)

stay on

b)

go off

75.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
76.
What is one problem with using a series circuit? 
a)
It has a lot of series. 
b)
If one light goes down, they all go down! 
c)
It doesn't work properly.
d)
There are no problems. 
77.
What is a benefit of using a parallel circuit?  
a)
It gets confusing.
b)
There are no problems.
c)
If one light goes out, it does not affect the others. 
d)
If one light goes out, they all go out. 
78.

What is Current?

a)

Rubber, styrofoam, cotton

b)

The flow of electrons in a circuit

c)

A material that stops heat and electric current from flowing

d)

Paperclip, penny, pencil lead

79.
a)
A2 = A3
b)
A2 + A3 = A1
c)
A1 + A2 = A3
d)
A4 = A2 - A3
80.
a)
all bulbs are lit equally
b)
the two top bulbs are brighter
c)
the single lower bulb is brighter
d)
the single bulb does not light and the other two are dim
81.
This circuit does not work because…
a)
the bulbs are not connected properly
b)
two cells are not powerful enough
c)
there is a break in the circuit
d)
the cells are facing each other
82.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
 can still light up
c)
 will go out
d)
of the light bulbs burn out also
83.
Does this statement best describe a parallel or a series circuit.
 
When more light bulbs are added they all remain bright. 
a)
Parallel circuit
b)
Series circuit
84.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
85.

If another bulb is added in a parallel circuit, each bulb would

a)

stay the same

b)

get dimmer

86.

Does this circuit have one or two paths?

a)

one path

b)

two paths

87.

Is this circuit a series or parallel circuit?

a)

series

b)

parallel

88.

In parallel circuit, there are _________ pathways for charge to flow.

a)

One

b)

Two or more

c)

None

d)

Zero

89.

In a parallel circuit, if we remove one of the light bulb, what will happen to the other light bulb?

a)

The other light bulb will stay on.

b)

The other light bulb will be off

c)

Both light bulb will be on

d)

Both light bulb will be off

90.

If we add more light bulbs into a parallel circuit, how will the brightness of the bulbs change?

a)

It will get dimmer

b)

It will get brighter

c)

The brightness will stay the same

d)

None of the light bulb will be on

91.

Which one is the circuit diagram of this picture?

a)
b)
c)
d)
92.

In a parallel circuit the current flowing into or out of the parallel branches is equal to the sum of the individual current in each of the parallel branches.

a)

false

b)

true

93.

According to Ohm's Law, current equals the voltage divided by the _________.

a)

Resistance

b)

Inductance

c)

Capacitance

d)

Power

e)

Conductance

94.

What is the Voltage, V in the circuit shown?

a)

6.5 V

b)

26 V

c)

0.15 V

95.

If there are 40 Volts and 5 Amps running through an electrical circuit, what is the resistance of the circuit?

a)

1 Ohm

b)

2 Ohms

c)

4 Ohms

d)

6 Ohms

e)

8 Ohms

96.
the  resistance of the two conductor 
a)
R2 > R3
b)
R2 = R3
c)
R2 < R3
d)
NONE OF THE ABOVE 
97.
What word means how much energy is given to / removed from the electrons.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
98.
What word means how hard it is for electrons to flow through.
a)
Current
b)
Voltage
c)
Resistance
d)
Power
99.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
100.

States that the current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance.


You can use this law to calculate the current in a wire when the resistance and the voltage are known.

a)

Newton's 1st Law of Motion

b)

Bernoulli's Principle

c)

Ohm's Law

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