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Worksheets

JC Electricity

Total questions: 36

Worksheet time: 26mins

Name
Class
Date
1.

Why do electricians always wrap wires in plastic?

a)

Plastic comes in many different colors

b)

Plastic is a good electrical conductor

c)

Plastic makes the wires easy to bend

d)

Plastic is a good electrical insulator

2.

Which of these materials is a good conductor of electricity?

a)

Rubber

b)

Metal

c)

Newspaper

d)

Glass

3.

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

4.
A particle that carries a negative electric charge is called a(n) ______.
a)
neutron
b)
atom
c)
proton
d)
electron
5.
The potential difference that causes charges to move in a circuit is ___.
a)
voltage
b)
resistance
c)
current
d)
electric discharge
6.
An example of a voltage source is a _____.
a)
voltmeter
b)
battery
c)
resistance
d)
switch
7.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source. 
c)
Electricity flows along more than one pathway. 
d)
The flow of electricity comes from more than one source. 
8.
Which best describes a series circuit? 
a)
It has two light bulbs. 
b)
The same current flows through both light bulbs. 
c)
It uses a single battery.
d)
The current is divided between the light bulbs. 
9.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
10.
What will happen if one light bulb is removed from this circuit?
a)
the other bulbs will go out
b)
the other bulbs will get dimmer
c)
the other bulbs will get brighter
d)
the battery will become stronger
11.

The instrument that measures electric current is called ___________.

a)

a resistor

b)

a voltmeter

c)

an ammeter

d)

an electrometer

12.

Calculate the current flowing through a circuit when there is a 20v battery and two 2ohm resistors

a)

10

b)

24

c)

4

d)

5

13.

The rate of electron flow in a circuit

a)

Voltage

b)

Resistance

c)

Current

14.

Opposition to the flow of electrons

a)

Current

b)

Voltage

c)

Resistance

15.

Unit is Ohms Ω\Omega  

a)

Current

b)

Resistance

c)

Voltage

16.

Unit is Amps (A)

a)

Current

b)

Voltage

c)

Resistance

17.

Unit is Volts (V)

a)

Current

b)

Voltage

c)

Resistance

18.

Splits down different paths in parallel circuits

a)

Current

b)

Resistance

c)

Voltage

19.

Stays the same no matter where you measure it in series circuits

a)

Current

b)

Resistance

c)

Voltage

20.

Increases as you add more bulbs to a series circuit

a)

Resistance

b)

Current

c)

Voltage

21.

Decreases as you add more pathways in a parallel circuit

a)

Resistance

b)

Voltage

c)

Current

22.

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

23.
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
24.

What is the unit of Electrical Power?

a)

Joule

b)

Watt

c)

Where

d)

Amp

25.

Ohms Law states that voltage and current are directly proportional to each other. Which graph best represents a material behaving according to Ohm's law?

a)
b)
c)
d)
26.

LDR means

a)

Light Dependent Resistor

b)

Light Device Regulator

c)

Low Drive Resistor

27.

Choose the correct symbol for this component!

a)
b)
c)
d)
28.

Name this component

a)

resistor

b)

LED

c)

cell

d)

switch

29.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
30.

What is sustainability?

a)

Indicators

b)

Planning for future generations to use all of all the resources.

c)

Meeting the needs of the present.

d)

Meeting the needs of the present without compromising the needs of future generations.

31.

What is the component labelled C?

a)

Battery

b)

Buzzer

c)

Light bulb

d)

Switch

32.

This is the symbol for a...

a)

Light Emitting Diode

b)

Light Dependent Resistor

c)

Fuse

d)

Cell

33.

This is the symbol for a...

a)

Battery

b)

Thermistor

c)

Motor

d)

Fuse

34.

This is the symbol for a...

a)

Thermistor

b)

Fixed Resistor

c)

Variable Resistor

d)

Fuse

35.

Electric current is measured in

a)

kWh

b)

Amps

c)

Ohms

d)

Watts

36.

A device that contains a thin strip of metal that melts easily if the current in the circuit is too high

a)

Fuse

b)

resistor

c)

earth wire

d)

battery

e)

diode

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