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Current, Voltage, Resistance and Ohm Law

Total questions: 95

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

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

e)

7 V

2.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
3.

How many Volts would it take to push 1 Amp through a resistance of 1 Ohm

a)

10 volts

b)

1 volt

c)

48 volts

d)

5 volts

e)

2 Volts

4.

What is the Voltage of a circuit that has a resistance of 10 Ω and a current of 2 A?

a)

20 V

b)

10 V

c)

5 V

d)

0.2 V

e)

12 V

5.

What resistance is needed to cause a 20A current flow because of a 100V battery?

a)

0.2Ώ

b)

2000Ώ

c)

120Ώ

d)

5Ώ

e)

120Ώ

6.

What resistance is needed to cause a 50A current flow because of a 500V battery?

a)

10Ώ

b)

5Ώ

c)

2500Ώ

d)

550Ώ

e)

0.1 Ώ

7.

What resistance is needed to cause a 10A current flow because of a 40V battery?

a)

0.25Ώ

b)

400Ώ

c)

50Ώ

d)

4Ώ

e)

30Ώ

8.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
9.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
10.

Resistance causes the electrons to slow down

a)

True

b)

False

11.

Resistance pushes the electrons to flow around the circuit

a)

True

b)

False

12.

What Current will flow if the circuit has a 20Ώ resistance and a 100V battery?

a)

0.2A

b)

2000A

c)

120A

d)

5A

e)

120A

13.

What Current will flow if the circuit has a 10Ώ resistance and a 60V battery?

a)

50A

b)

600A

c)

0.1666A

d)

6A

e)

70A

14.

What Current will flow if the circuit has a 2V battery and a 10Ώ resistance?

a)

5A

b)

8A

c)

12A

d)

0.2A

e)

20A

15.

Can you remember Ohms Law? choose the correct equation

a)

R= V x I

b)

R= V - I

c)

R= V + I

d)

R= V ÷ I

16.

Can you remember Ohms Law? choose the correct equation

a)

V x R = I

b)

V - R = I

c)

V + R = I

d)

V ÷ R= I

17.

Can you remember Ohms Law? choose the correct equation

a)

I x R = V

b)

I - R = V

c)

I + R = V

d)

I ÷ R= V

18.

Use the picture to work out which equation is correct?

a)

I x R = V

b)

I - R = V

c)

I + R = V

d)

I ÷ R= V

19.

Use the picture to work out which equation is correct?

a)

V x R = I

b)

V - R = I

c)

V + R = I

d)

V ÷ R= I

20.

Use the picture to work out which equation is correct?

a)

V x I = R

b)

V - I = R

c)

V + I = R

d)

V ÷ I = R

21.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
22.

Which colour best represents voltage in this picture

a)

yellow

b)

blue

c)

green

d)

red

23.

Voltage is measured in __.

a)

volts.

b)

watts.

c)

ohms

d)

amps

24.

What is the unit for measuring resistance?

a)

Amp

b)

Ohm

c)

Coulomb

d)

Watt

25.

Which colour best represents the resistance in this circuit

a)

yellow

b)

red

c)

green

d)

blue

26.

This component is needed to push electrons around a complete circuit.

a)
switch
b)
cell
c)
bulb
d)
resistor
27.

Which colour best represents the current in this picture

a)

yellow

b)

green

c)

blue

d)

red

28.

What effect does adding batteries have on the voltage?

a)

volts rise

b)

volts fall

c)

voltage stays the same

d)

voltage stops

29.

Which colour best represents the VOLTS

a)

yellow

b)

blue

c)

green

d)

red

30.

What effect does adding bulbs have on the resistance?

a)

resistance Increases

b)

resistance decreases

c)

resistance stays the same level

d)

resistance stops

31.

Which colour best represents the AMPS

a)

yellow

b)

green

c)

blue

d)

red

32.

What effect does raising the resistance have on the current?

a)

Current Increases

b)

Current decreases

c)

Current stays the same level

d)

Current reverses

33.

Which colour best represents the OHMS

a)

yellow

b)

red

c)

green

d)

blue

34.

What effect does raising the voltage have on the current?

a)

Current Increases

b)

Current decreases

c)

Current stays the same level

d)

Current reverses

35.

What effect does lowering the resistance have on the current?

a)

Current Increases

b)

Current decreases

c)

Current stays the same level

d)

Current reverses

36.

What effect does lowering the voltage have on the current?

a)

Current speeds up

b)

Current slows

c)

Current stays the same level

d)

Current reverses

37.

if the circuit goes from 2V to 30V, what would you expect?

a)

Amps go up

b)

Amps go down

c)

Amps stay the same

38.

if the circuit goes from 670V to 2V, what would you expect?

a)

Amps go up

b)

Amps go down

c)

Amps stay the same

39.

if the circuit goes from 999Ω down to 2Ω, what would you expect to happen?

a)

Amps go up

b)

Amps go down

c)

Amps stay the same

40.

if the circuit goes from 4Ω up to to 800Ω, what would you expect to happen?

a)

Amps go up

b)

Amps go down

c)

Amps stay the same

41.

Which colour best represents the wire in this picture

a)

yellow

b)

blue

c)

green

d)

red

42.

What effect does removing one of the batteries have on the voltage?

a)

voltage Increases

b)

voltage decreases

c)

voltage stays the same level

d)

voltage reverses

43.

What effect does removing bulbs have on the resistance?

a)

resistance Increases

b)

resistance decreases

c)

resistance stays the same level

d)

resistance reverses direction

44.

Which circuit has the fastest current?

a)

Circuit W

20V

2A

10Ω

b)

Circuit Z

100V

50A

2Ω

c)

Circuit Y

800V

8A

100Ω

d)

Circuit X

1600V

2A

800Ω

45.

Which circuit has the Highest Current ?

a)

Circuit X

20V

2A

10Ω

b)

Circuit Y

100V

25A

4Ω

c)

Circuit W

800V

8A

100Ω

d)

Circuit Z

1600V

2A

800Ω

46.

Which circuit has the Weakest push from the battery ?

a)

Circuit Y

20V

2A

10Ω

b)

Circuit X

100V

25A

4Ω

c)

Circuit Z

800V

8A

100Ω

d)

Circuit W

8V

4A

2Ω

47.

Which circuit has the Highest Resistance?

a)

Circuit X

20V

2A

10Ω

b)

Circuit Y

100V

25A

4Ω

c)

Circuit Z

800V

8A

100Ω

d)

Circuit W

8V

4A

2Ω

48.

Which circuit has the LOWEST RESISTANCE?

a)

Circuit X

20V

2A

10Ω

b)

Circuit Y

500V

500A

1Ω

c)

Circuit W

800V

8A

100Ω

d)

Circuit Z

8V

4A

2Ω

49.

What 'flows' in a wire to make a current?

a)

Protons

b)

Neutrons

c)

Atoms

d)

Electrons

e)

copper

50.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
51.

Which circuit has the biggest push from the battery ?

a)

Circuit Y

20V

2A

10Ω

b)

Circuit X

100V

25A

4Ω

c)

Circuit Z

800V

8A

100Ω

d)

Circuit W

8V

4A

2Ω

52.

Which circuit has the lowest current ?

a)

Circuit Y

20V

2A

10Ω

b)

Circuit X

100V

25A

4Ω

c)

Circuit Z

800V

8A

100Ω

d)

Circuit W

8V

4A

2Ω

53.

What units are used by an ammeter ?

a)

amps (A)

b)

volts (V)

c)

charge (C)

d)

force (F)

54.

The job of an ammeter is to ....

a)

measure current

b)

power the circuit

c)

measure voltage

d)

create current

55.

What word means a 'rate of flow of electrons'?

a)

current

b)

voltage

c)

power

d)

conductor

56.

Which letter shows the circuit symbol for an ammeter ?

(a)  

57.

Where could an ammeter be placed to measure the current?

a)
b)
58.

Where should an ammeter be placed to measure the current?

a)

b)

59.

Which Ammeter should show a higher reading?

a)

Ammeter 1 is higher

b)

Ammeter 2 is higher

c)

Both Ammeters say the same

60.

Ammeter 1 has a reading of 8 amps.

What number will Ammeter 2 show?

a)

8A

b)

4A

c)

0A

d)

16A

61.

Which machine measures 'rate of flow of electrons'?

a)

Ammeter

b)

Voltmeter

c)

Thermometer

d)

Timer

e)

Generator

62.

Which ammeters are set up correctly to find the current going through the bulbs?

a)
b)
c)
d)
63.

Which ammeters will give the same reading as Ammeter 1?

a)
b)
c)
64.

How should an ammeter be set up ?

a)

put it in series

b)

put it in parallel

65.

which circuit would have the most amps showing on the ammeter ?

a)

b)

c)

66.

which circuit would have the most amps showing on the ammeter ?

a)
b)

c)

67.

which circuit would have the least amps showing on the ammeter ?

a)
b)
c)
68.

which circuit would have the least amps showing on the ammeter ?

a)
b)
c)
69.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
70.
How should you put in an Ammeter?
a)
In Parallel
b)
In Series
71.

A voltmeter should be placed ........... in a circuit

a)

in parallel

b)

in series

c)

at the top

d)

upside down

72.

This is the circuit symbol for ...

a)

a battery

b)

a potential difference

c)

an ammeter

d)

a voltmeter

73.

This is the circuit symbol for ...

a)

a potential difference

b)

a battery

c)

an ammeter

d)

a voltmeter

74.

This component gives the circuit a potential difference

a)

true

b)

false

75.

The difference in electrical potential energy between two places is called

a)

resistance

b)

current

c)

conduction

d)

voltage

76.

What word means a 'flow of electrons'?

a)

current

b)

voltage

c)

resistance

d)

insulator

77.

Why can the battery create a current in a wire?

a)

it creates all the electrons that flow

b)

it has strong gravity

c)

it causes potential difference

d)

it contains a magnet

78.

How many of these ammeters are correctly set up?

a)

1

b)

3

c)

4

d)

5

e)

2

79.

Which term is another way of describing voltage?

a)

potential difference

b)

possible difference

c)

different currents

d)

pre differentiation

e)

potential diffusion

80.

What term is also known as 'potential difference'?

a)

voltage

b)

current

c)

resistance

d)

power

e)

efficiency

81.

This machine that is shown in the picture can measure ...

a)

the potential difference between two places

b)

the speed of the electrons

c)

the power of resistance

d)

the efficiency of the bulb

82.

The machine in this picture can measure ...

a)

the potential difference between 2 places

b)

the speed of the electrons

c)

the power of the resistance

d)

the efficiency of the bulb

83.

Which picture of a battery represents the biggest potential difference?

a)

red

b)

green

c)

blue

d)

they are all the same

84.

Which picture of a battery represents the smallest potential difference?

a)

red

b)

green

c)

blue

d)

they are all the same

85.

Which picture of a battery represents the lowest voltage?

a)

red

b)

green

c)

blue

d)

they are all the same

86.

Which picture of a battery represents the greatest voltage?

a)

red

b)

green

c)

blue

d)

they are all the same

87.

Which picture of a battery would get the largest reading on a voltmeter if it was put in a circuit?

a)

red

b)

green

c)

blue

d)

they are all the same

88.

Which picture of a battery would provide the biggest pushing force on the electrons in the circuit?

a)

red

b)

green

c)

blue

d)

they are all the same

89.

Which picture of a battery would provide the biggest pushing force on the electrons in the circuit?

a)

red

b)

green

c)

blue

d)

they are all the same

90.

Which picture of a battery would get the smallest reading on a voltmeter if it was put in a circuit?

a)

red

b)

green

c)

blue

d)

they are all the same

91.

Which picture of a battery represents the biggest potential difference?

a)

red

b)

green

c)

blue

d)

they are all the same

92.

Which picture of a battery represents the smallest potential difference?

a)

red

b)

green

c)

blue

d)

they are all the same

93.

Which picture of a battery would provide the smallest pushing force on the electrons in the circuit?

a)

red

b)

green

c)

blue

d)

they are all the same

94.

Where would you place an ammeter in the circuit?

a)

Green ?

b)

Red ?

95.

Where would you place a voltmeter in the circuit?

a)

Green ?

b)

Red ?

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