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Unit 7 - Electricity

Total questions: 88

Worksheet time: 7hrs 20mins

Name
Class
Date
1.

Electric current flows from

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

2.

Electric current is defined as

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

3.

Electrons flows from

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

4.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
5.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
6.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
7.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
8.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
9.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
10.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
11.
What voltage is needed to cause a 5A current flow through a 2Ω resistor?
a)
10V
b)
2.5V
c)
7V
d)
0.4V
12.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
13.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
14.

The girl's hair and the comb are attracting one another. The hair and the comb have

a)

opposite charges

b)

like charges

15.
An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —
a)
Point D to Point C
b)
Point B to Point C
c)
Point A to Point D
d)
Point B to Point D
16.
This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -
a)
the switch gives energy to the battery
b)
the buzzer is made of special plastic
c)
the wires are cooled by the surrounding air
d)
electricity can flow in a complete path
17.
Choose the correct sentence.
a)
This circuit will work because it is an open circuit.
b)
This circuit will work because it is a closed circuit.
c)
This circuit will NOT work because it is an open circuit.
d)
This circuit will NOT work because it is a closed circuit.
18.

Electricity is a form of energy involving the flow of atoms.

a)

True

b)

False

19.

Which is an example of how we use electricity?

a)

Battery

b)

Solar panels

c)

Light bulb

d)

Wind turbine

20.

In a circuit diagram, this symbol represents a

a)

switch

b)

multimeter

c)

battery

d)

globe

21.

Which light globe(s) would never light up?

a)

A

b)

B,C,D

c)

A,B,C,D

d)

None

22.

Voltage is the measure of the...

a)

difference in electrical energy between 2 parts of a circuit

b)

amount of electric charge that flows through a circuit

23.

What is used to measure electric current?

a)

Voltmeter

b)

Ammeter

c)

Wattmeter

d)

pH meter

24.

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

a)

Voltage will increase

b)

Voltage will decrease

c)

Voltage will stay the same

25.

If you increase the voltage across a resistor, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

26.

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

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

27.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
28.
The flow of electricity in a circuit-
a)
current
b)
flow
c)
circuit
29.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
30.
The unit for current is the 
a)
Volt
b)
Ohm
c)
Electron
d)
Amp
31.
The continuous flow of electric charges through a material is called...
a)
Electric Field
b)
Electric Force
c)
Electric Current
d)
Electric Circuit
32.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
33.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
34.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
35.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
36.
The flow of electricity requires a
a)
complete path
b)
incomplete path
c)
insulated current
37.
When socks get stuck to towels in your dryer, this is an example of________________
a)
current electricity
b)
static electricity
38.
True or False, Lighting is a form of static electricity.
a)
True
b)
False
39.

Static means ____________.

a)

moving

b)

not moving

40.
Electric current is measured in ______.
a)
Watts
b)
Volts
c)
Amperes
41.
Thicker wires have _______ resistance than thinner wires.
a)
more
b)
less
c)
the same
42.
Which formulas represents Ohm's law?
a)
V=IR
b)
R=IV
c)
I=RV
43.
Which subatomic particles have a positive charge?
a)
neutrons
b)
electrons
c)
protons
44.
An accumulation of electrons on an object is known as ___________.
a)
current
b)
AC
c)
static electricity
45.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
46.
How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps? 
a)
.5 Volts
b)
5 Volts
c)
20 Volts
47.
Electricity is the flow of _________.
a)
protons
b)
neutrons
c)
electrons
48.

Which of the following best explains an electric current?

a)

An electric current is the flow of positive charges in a circuit.

b)

An electric current is the flow of atoms in a circuit.

c)

An electric current is the flow of electrons in a circuit.

d)

An electric current is the flow of neutrons in a circuit.

49.

Which of the following statements is correct about electrical insulators?

a)

They do not contain any atoms.

b)

Their protons are not allowed to move about freely.

c)

The electrons are not able to move about freely.

d)

They are good at conducting heat only.

50.

Which of the following is the SI unit for electric current?

a)

Ohm

b)

Watt

c)

Ampere

d)

Volt

51.

The instrument that measures electric current is called ___________.

a)

a resistor

b)

a voltmeter

c)

an ammeter

d)

an electrometer

52.

What are the three properties of an electric circuit?

a)

Current, Voltage, Power

b)

Current, Voltage, Resistance

c)

Power, Voltage, Resistance

d)

Current, Power, Resistance

53.

What is the unit for current

a)

Watts

b)

Ohms

c)

Volts

d)

Amperes

54.

What is the unit for voltage

a)

Watts

b)

Ohms

c)

Volts

d)

Amperes

55.

What is the unit for resistance

a)

Watts

b)

Ohms

c)

Volts

d)

Amperes

56.

What is the symbol for resistance

a)

𝝮

b)

A

c)

V

d)

W

57.

What is the symbol for voltage

a)

𝝮

b)

A

c)

V

d)

W

58.

What is the symbol for current

a)

𝝮

b)

A

c)

V

d)

W

59.

What are facts about electricity

a)

Flow of electrons

b)

Provides heat

c)

Provides sound

d)

All of the above

60.

What is resistance?

a)

Flow of electrical charge

b)

Pressure from power to push electrons

c)

Limits the flow of electrons

61.

How do you find Voltage?

a)

I ÷ RI\ \div\ R

b)

R ÷IR\ \div I

c)

I×RI\times R

d)

I ×WI\ \times W

62.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
63.

Opposite charges

a)

repel

b)

attract

c)

do nothing

64.

Part of the atom with neutral charge

a)

neutron

b)

electron

c)

proton

d)

negatron

65.

Part of the atom with positive charge

a)

neutron

b)

electron

c)

proton

d)

negatron

66.

Part of the atom with negative charge

a)

neutron

b)

electron

c)

proton

d)

negatron

67.

Parts of the atom

a)

Protons, negatons, elephantons

b)

neutrons, protons

c)

neutrons, protons, electrons

68.

Why is electrical wiring usually made of copper?

a)

copper is shiny

b)

copper is not magnetic

c)

copper conducts electricity

d)

copper is an insulator

69.

In a circuit, what are the conductors?

a)

rubber part of switch

b)

wires

c)

wood block

d)

glass bulb

70.

Materials that do not easily transmit heat or electricity are

a)

battery

b)

insulators

c)

load

d)

conductors

71.

What supplies energy to an electric circuit?

a)

battery

b)

wire

c)

lightbulb

d)

conductor

72.

An example of a good insulator is

a)

iron

b)

rubber

c)

metal

d)

silver

73.

An example of a good conductor is

a)

plastic

b)

rubber

c)

styrofoam

d)

copper

74.

What type of charge does the atom have?

a)

positive

b)

negative

c)

neutral

75.

What happens to the current of electricity when the switch is up?

a)

The lightbulb will light

b)

the lightbulb will not light

c)

None of the above

76.

Resistance is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

77.

Potential difference is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

78.

Electric current is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

79.

Is the symbol for _____.

a)

Light bulb

b)

Resistor

c)

Battery

d)

Switch

80.

Is the symbol for _____.

a)

Light bulb

b)

Resistor

c)

Battery

d)

Switch

81.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
82.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
83.
An object becomes postiively charged when which of the following occurs?
a)
loses electrons
b)
gains electrons
c)
loses protons
d)
gains neutrons
84.
Which of the following an insulator?
a)
copper
b)
wood
c)
silver
d)
salt water
85.
Lightning is _____.
a)
a buildup of neutrons
b)
harmless
c)
a high-voltage electric current
d)
a large discharge of static electricity
86.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
87.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
88.
An object becomes charged when the atoms in the object gain or lose
a)
electrons
b)
protons
c)
neutrons
d)
all of the above

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