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ELECTRICITY

Total questions: 78

Worksheet time: 1hrs 18mins

Name
Class
Date
1.

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

2.

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

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.

Galvanometer is used to

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

5.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
6.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
7.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
8.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
9.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
10.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
11.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
12.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
13.
What voltage is needed to cause a 5A current flow through a 2Ω resistor?
a)
10V
b)
2.5V
c)
7V
d)
0.4V
14.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
15.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
16.

Which is an example of how we use electricity?

a)

Battery

b)

Solar panels

c)

Light bulb

d)

Wind turbine

17.

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

a)

True

b)

False

18.

What are the two types of electricity?

a)

Static and electrons

b)

Current and voltage

c)

Series and parallel

d)

Static and current

19.

What 3 things does a circuit need for current to flow?

a)

energy source, energy user, wires

b)

energy source, switch, wires

c)

energy source, energy user, switch

d)

energy user, switch, wires

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.

What is used to measure electric current?

a)

Voltmeter

b)

Ammeter

c)

Wattmeter

d)

pH meter

23.

What type of circuit is this?

a)

Series

b)

Parallel

c)

Simple

24.

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

25.

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

26.

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

27.

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

28.

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

29.

Which of these materials is a good insulator?

a)

gold

b)

copper

c)

silver

d)

plastic

30.

In a series circuit, what will happen if the path for the electrical current is broken by a burned out bulb?

a)

The electrical current will stop fllowing and none of the bulbs will light up.

b)

The electrical current will continue flowing and the other bulbs will light up.

c)

The energy source will continue to move the electric charge through the circuit.

31.

An electric tooth brush is an example of transforming

a)

electricity into heat

b)

electricity into sound energy

c)

electricity into motion energy

d)

electricity into light

32.

Which of the folowing uses resistors to transform electricity into sound?

a)

a teacher blowing a whistle

b)

drums

c)

an electric piano

d)

a flute

33.

Which of the following can transform electrical energy into heat?

a)

a hair dryer

b)

a warm sweater

c)

a barbeque grill

d)

the sun

34.

The resistor in an incandescent lightbulb is called

a)

flourescent

b)

a filament

c)

the Edison

d)

the insulator

35.

Which of the following is a good conductor?

a)

copper

b)

rubber

c)

dry wood

d)

glass

36.

Which type of circuit has more than one path for the electrical current?

a)

The series circuit

b)

The parallel circuit

c)

They both have more than one path

d)

Neither circuit has more than one path for the electrical current

37.

Electrical current is either alternating current (AC) which comes through the wires and outlets in your home or

a)

direct current which comes from batteries

b)

direct current which comes from a power plant

c)

continuous currect which is from solar energy

d)

discreet current which comes from batteries

38.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
39.

What voltage is needed to cause a 50A current flow through a 10Ω resistor?

a)

15V

b)

500V

c)

500 kV

d)

0.2V

40.

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

41.

How can it be explained that someone's hair can stick to a balloon?

a)

There is static electricity

b)

There is too much dust in the air

c)

A parallel circuit was too long

d)

The person needs to wash his hair

42.

Which contribution toward understanding electricity was made by Michael Faraday?

a)

Created the first electric power generator

b)

Discovered that lightning carried electricity

c)

Concentrated on mass-producing long-lasting light bulbs

d)

Improved the telegraph system

43.

What contribution did Thomas Edison make toward the study of electricity?

a)

He invented the light bulb

b)

He invented a generator that would produce electricity

c)

He discovered the nucleus of an atom

d)

He discovered that lightning is a form of electricity

44.

A science class was completing an experiment on electrical circuits. Why did the bulb go out each time the switch was opened?

a)

Opening the switch broke the circuit

b)

The battery was probably going flat

c)

There was too much electricity flowing

d)

Opening the switch closed the circuit

45.

Who is the scientist that created the lightning rod?

a)

Michael Faraday

b)

Thomas Edison

c)

Benjamin Franklin

d)

George Washington

46.
Switch
a)
The part of a circuit which can control whether electricity flows
b)
An electrical force which occurs as electrons are built up in an object
c)
A small device that stores energy in a chemical form
d)
The area of a conductor through which a current is able to move
47.
Series circuit
a)
A material that allows electricity to go through it
b)
Only one pathway for the electricity to flow
c)
A device which provides energy for a circuit
d)
More than one path for the electricity to flow
48.
Is a house in a good idea for a parallel circuit
a)
Yes 
b)
No
49.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
50.
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
51.
In an electrical circuit, electrons move from the __________.
a)
Negative pole to negative pole
b)
Negative pole to positive pole
c)
Positive pole to positive pole
52.

Which circuit can be used to determine the electromotive force of a battery?

a)
b)
c)
d)
53.

One dry cell with e.m.f value of 2V and internal resistance 1Ω is connected to one resistor 4Ω

a)

0.4A

b)

0.5A

c)

2.0A

d)

2.5A

54.

Determine:

(a) the e.m.f of the cell


*beza keupayaan(potential difference)

*Arus(current)

a)

0.9

b)

0.6

c)

1.5

55.

Determine:

(b) the internal resistance


*beza keupayaan(potential difference)

*Arus(current)

a)

1 ohm

b)

2 ohm

c)

3 ohm

d)

4 ohm

56.

•Electromotive = potential + voltage

force difference loss


E = V + v

E = V + Ir

Internal resistance, r = ?

a)

(E – V)

2I

b)

(V – E)

I

c)

(E – V)

I

d)

(I – V)

E

57.


y = mx + c

from graph, state the correct answer represent equation using
V, E, I and -r

a)

V  = -rE+I

b)

E  = -rI + v

c)

V  = -rI + E

d)

V  =rI +E

58.

Which statement is FALSE about EMF?

a)

Energy supply by a source to transfer a unit charge from one terminal to another terminal

b)

No current flow in the circuit, voltmeter readings = e.m.f

c)
d)

There is current flow in the circuit. voltmeter readings = p.d across resistance

59.

From diagram, what 1.5 V refers to

a)

Internal resistance

b)

Potential difference

c)

Electromotive force

d)

Voltage

60.

From the graph, what is given by the gradient?

a)

Resistance

b)

Internal resistance

c)

Potential difference

d)

Electromotive force

61.

What is the electromotive force of battery?

a)

0.5 V

b)

1.0 V

c)

1.5 V

d)

2.0 V

62.

Calculate the internal resistance, r

a)

0.1 ohm

b)

0.2 ohm

c)

0.3 ohm

d)

0.4 ohm

63.

The voltmeter is measuring a ...

(a)  

64.

The voltmeter is recording the reading of

(a)  

65.

It is an energy supply by a battery/ electrical source to a coulumb unit of charge.

This refers to

a)

Potential difference

b)

Internal resistance

c)

Electromotive force

d)

Current

66.

What is the electromotive force of battery?

a)

0.5 V

b)

1.0 V

c)

1.5 V

d)

2.0 V

67.

From the graph, what is given by the gradient?

a)

Resistance

b)

Internal resistance

c)

Potential difference

d)

Electromotive force

68.

It is a work done or energy supply to move a unit of charge from 1 point to another point in a closed circuit

This refers to

a)

Internal resistance

b)

Potential difference

c)

Electromotive force

d)

Resistance

69.
The cell has internal resistance, r, and electromotive force of 1.5 V.
What is the reading of voltmeter when the switch is closed?
a)
More than 3.0 V
b)
Less than 1.5 V
c)
More than 1.5 V
d)
1.5 V
70.
A battery has an e.m.f of 6.0 V. When it is connected to an external resistor, the potential different is 2.6 V and the current is 0.6 A. 
What is the value of the internal resistance?
a)
3.4 Ω
b)
4.3 Ω
c)
4.4 Ω
d)
5.7 Ω
71.
What is the internal resistance of the battery in the circuit?
a)
9.40 Ω
b)
11.50 Ω
c)
12.50 Ω
d)
13.50 Ω
72.

What is emf?

a)

the electro motive "force" or the force on electrons

b)

the electromotive "force" or the Voltage of a cell measured when there is no current flowing

c)

the electromotive "field" or the Voltage of a cell measured when there is no current

d)

the electromotive "force" or Voltage of a cell measured when connected to a circuit

73.

Correct

a)

 \epsilon=V+Ir  

b)

 \epsilon=I\left(R+r\right)  

c)

 ϵ=V\epsilon=V  

74.

What is internal resistance?

a)

the resistance inside the cell that increases with more current drawn from the cell

b)

the resistance inside the cell that decreases with more current drawn from the cell

c)

the resistance inside the cell that remains constant as the current drawn from the cell changes

d)

the resistance inside each component which increases as more resistances are added in series

75.

rheostat

a)

resistor

b)

thermister

c)

variable capacitor

d)

variable resistor

76.

Which statement is FALSE about EMF?

a)

Energy supply by a source to transfer a unit charge from one terminal to another terminal

b)

No current flow in the circuit, voltmeter readings = e.m.f

c)
d)

There is current flow in the circuit. voltmeter readings = p.d across resistance

77.

A student investigates how the potential difference V across the terminals of a cell varies with the current I in the cell.


Which graph correctly shows how V varies with I?

a)

A

b)

B

c)

C

d)

D

78.

What is the SI unit for Electromotive force?

Apakah unit SI bagi Daya gerak elektrik?

a)

V

b)

A

c)

Ω

d)

W

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