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electricity

Total questions: 65

Worksheet time: 1hrs 27mins

Name
Class
Date
1.
A particle that carries a negative electric charge is called a(n) ______.
a)
neutron
b)
atom
c)
proton
d)
electron
2.
When you charge an electroscope by touching it with a charged balloon, the process is called _____.
a)
friction
b)
conduction
c)
induction
d)
grounding
3.
The potential difference that causes charges to move in a circuit is ___.
a)
voltage
b)
resistance
c)
current
d)
electric discharge
4.
An example of a voltage source is a _____.
a)
voltmeter
b)
battery
c)
resistance
d)
switch
5.
A circuit that is connected to Earth is said to be _____.
a)
series
b)
parallel
c)
grounded
d)
discharged
6.
Your hair might be attracted to your comb as your hair and the combe become oppositely charged.
a)
true
b)
false
7.
Conduction is the process of charging an object without touching it.
a)
true
b)
false
8.
Electrical resistance is low in a good conductor.
a)
true
b)
false
9.

The student conducted an experiment with circuits. Why was the bulb bright when he closed the switch?

a)

The switch produced an electric current

b)

Closing the switch broke the circuit

c)

Closing the switch completed the circuit

d)

The switch did not make a difference

10.

Which of the following items would conduct electricity?

a)

Aluminum ladder

b)

Metal screwdriver

c)

Wooden baseball bat

d)

Rubber flip flops

11.

which of the following materials are best used as insulators?

a)

Wood

b)

Rubber

c)

Metal

d)

Plastic

12.

Electricity used to operate a toaster or stove is transformed to -

a)

Potential energy

b)

Mechanical energy

c)

Superior energy

d)

Radiant energy

13.
The rearrangement of electrons on a neutral object caused by a nearby charged object 
a)
Induction 
b)
Conduction 
c)
Friction 
d)
Conductor 
14.
The flow/movement of electric charges 
a)
Voltage
b)
Resistance 
c)
Current 
d)
Circuit 
15.
The flow/movement of electric charges 
a)
Voltage
b)
Resistance 
c)
Current 
d)
Circuit 
16.
A closed path that electric current follows 
a)
Voltage
b)
Current
c)
Resistance 
d)
Circuit
17.
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit 
18.
According to this law, the current in a circuit equals the voltage difference divided by the resistance. 
a)
Law of Conservation of Energy 
b)
Ohm's Law 
c)
Law of Conservation of Charges
d)
Newton's First Law 
19.
The current has only has one loop to flow through in this circuit. 
a)
Series Circuit 
b)
Parallel Circuit 
20.
This circuit contains two or more branches for current to move through. 
a)
Series Circuit 
b)
Parallel Circuit 
21.
The accumulation of excess electric charge on an object is called
a)
Static electricity 
b)
Electric discharge
c)
Resistance
d)
Circuit 
22.

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.

23.

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.

24.

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

a)

Ohm

b)

Watt

c)

Ampere

d)

Volt

25.

An electric kettle is commonly used to heat up water at home. The heating element used is nichrome wire and not copper. Which of the following reasons best explains why nichrome is used instead of copper?

a)

Nichrome conducts more current than copper, so more heat can be generated.

b)

Nichrome has higher resistance than copper, so more heat can be generated.

c)

Nichrome has higher voltage than copper, so more heat can be generated.

d)

Nichrome are cheaper than copper, so it is more economical.

26.

A higher resistance in a circuit causes a _____________.

a)

higher voltage

b)

larger current

c)

smaller current

d)

lower voltage

27.
Lightning is an example of _________.
a)
static electricity
b)
current electricity
c)
watts
d)
voltage
28.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
29.
Identify the insulator below.
a)
aluminum foil
b)
paperclip
c)
rubber eraser
30.
Thicker wires have _______ resistance than thinner wires.
a)
more
b)
less
c)
the same
31.
As the resistance in a circuit increases, the electric current __________.
a)
increases
b)
decreases
c)
stays the same
32.
Which formulas represents Ohm's law?
a)
V=IR
b)
R=IV
c)
I=RV
33.
Which subatomic particles have a positive charge?
a)
neutrons
b)
electrons
c)
protons
34.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
35.
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
36.
Electricity is the flow of _________.
a)
protons
b)
neutrons
c)
electrons
37.
What type of circuit is pictured?
a)
series
b)
Parallel
38.

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

39.

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

40.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
41.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
42.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
43.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
44.
What voltage is needed to cause a 5A current flow through a 2Ω resistor?
a)
10V
b)
2.5V
c)
7V
d)
0.4V
45.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
46.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
47.
In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.
a)
Series
b)
Parallel
48.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
49.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
50.

What are the two types of electricity?

a)

Static and electrons

b)

Current and voltage

c)

Series and parallel

d)

Static and current

51.

In a circuit diagram, this symbol represents a

a)

switch

b)

multimeter

c)

battery

d)

globe

52.

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

53.

In a series circuit, how is the brightness of a light globe affected when another globe is connected?

a)

It gets brighter

b)

It stays the same

c)

It gets dimmer

d)

It goes out

54.

Why are Christmas lights wired in parallel?

a)

It is cheaper to make

b)

You can make longer strands

c)

It uses less electricity

d)

If a light breaks, the others keep working

55.

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

56.

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

57.

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

58.
In a parallel circuit with 2 lightbulbs, if you take out one lightbulb what will happen to the rest?
a)
They will all go out.
b)
The other one will stay on 
59.
What kind of picture does the picture show? 
a)
Closed/Complete
b)
Open/Incomplete
60.
In an electrical circuit, what does this symbol represent?
a)
wire
b)
resistor
c)
lightbulb
d)
switch
61.
Voltage difference is related to the force that causes electric charges to flow. 
a)
True
b)
False
62.

What is resistance?

a)

Flow of electrical charge

b)

Pressure from power to push electrons

c)

Limits the flow of electrons

63.

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

64.

How do you find Resistance?

a)

 I ÷ VI\ \div\ V 

b)

 V÷IV\div I 

c)

 V ×IV\ \times I 

d)

I ×WI\ \times W

65.

How do you find Current?

a)

 I ÷ VI\ \div\ V 

b)

 V÷IV\div I 

c)

 V ×RV\ \times R 

d)

 V ÷ RV\ \div\ R 

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