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Current Electricity

Total questions: 100

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

Electricity is a form of energy produced by charges.

a)

TRUE

b)

FALSE

2.

Current electricity is a form of energy when the charges are the rest.

a)

TRUE

b)

FALSE

3.

Static electricity is a form of energy when the charges are the rest.

a)

TRUE

b)

FALSE

4.
This is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
5.

What is the component labelled A?

a)

Battery

b)

Bell

c)

Light bulb

d)

Switch

6.

What is the component labelled B?

a)

Battery

b)

Bell

c)

Light bulb

d)

Switch

7.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
8.
a)
Switch (Closed)
b)
Switch (Open)
c)
Bulb
d)
Chassis Ground
9.
What is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
10.
a)
Light
b)
Battery
c)
Motor
d)
Switch (Closed)
11.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
12.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
13.
This is the symbol for a _____?
a)
Variable resistor
b)
Thermistor
c)
Resistor
d)
Fuse
14.
This is the symbol for a _____?
a)
Fixed resistor
b)
Variable resistor
c)
Fuse
d)
Box
15.

A closed path in which current flows is known as an Electric circuit.

a)

TRUE

b)

FALSE

16.

Is this picture shows the circuit diagram with actual instruments?

a)

YES

b)

NO

17.

Is this picture shows the circuit diagram with actual instruments?

a)

YES

b)

NO

18.

What is the best description for this picture?

a)
b)
19.

What is the description for this picture?

a)
b)
c)

Circuit is broken

d)

Electric current does not flow

20.

An electric current flows only when there is a:

a)

Source of electricity

b)

Open circuit

c)

Closed-circuit

d)

Broken filament

21.
Which circuit is pictured below?
a)
Parallel
b)
Incomplete
c)
Series
22.
A series circuit has how many pathways for the electrons to flow?
a)
Two
b)
One
c)
Many
d)
Zero
23.
In a series circuit, the receivers do what with the electricity?
a)
Get rid of it.
b)
Share it.
c)
Lose it
24.
In a series circuit, if one receiver is disconnected, nothing will work.
a)
true
b)
false
25.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
26.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
27.
This circuit has more than one loop. When one light goes out, the others stay on. 
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
28.
In a parallel circuit, if one connection is broken, all of the connections stop working.
a)
True
b)
False
29.
Parallel circuits are
a)
a circuit that has only one path for current to travel
b)
has more than one path for current to travel
c)
a circuit that does not allow electricity to travel through it
d)
magnets that cause electric current
30.
Does this statement best describe a parallel or a series circuit.
 
When more light bulbs are added they all remain bright. 
a)
Parallel circuit
b)
Series circuit
31.

Which one of this that are NOT basic component of simple circuit?

a)

Light bulb

b)

Wire

c)

Battery

d)

Appliances

32.

In series circuit, the lights are connected ________ to each other.

a)

Side by side

b)

Parallel

c)

Close by

d)

Effectively

33.

If one of the light bulb in series circuit is taken off, what will happen to the other light bulb?

a)

The other light bulb will be on

b)

The other light bulb will be off

c)

The other light bulb will stay on

d)

Both light bulb will be on

34.

In parallel circuit, there are _________ pathways for charge to flow.

a)

One

b)

Two or more

c)

None

d)

Zero

35.

Which one is the circuit diagram of this picture?

a)
b)
c)
d)
36.

This is an example of a series circuit

a)

yes

b)

no

37.

In this circuit, the electrons have ____ path(s) to follow.

a)

1

b)

more than 1

38.

In this circuit, the light bulbs share electrical pressure

a)

yes

b)

no

39.
a)
Bulbs are in parallel - Circuit X is brighter than Circuit Y
b)
Bulbs are in parallel - Circuit Y is brighter than Circuit X
c)
Bulbs are in series - Circuit X is brighter than Circuit Y
d)
Bulbs are in series - Circuit Y is brighter than Circuit X
40.
This circuit does not work because…
a)
the bulbs are not connected properly
b)
two cells are not powerful enough
c)
there is a break in the circuit
d)
the cells are facing each other
41.
a)
Circuit X is brighter than circuit Y
b)
Circuit Y is brighter than circuit X
c)
Both circuits have the same brightness
d)
Neither circuit will light the bulbs
42.

What will happen to the bulb on the left if the bulb on the right blows up?

a)

It will still light up.

b)

No changes.

c)

It will not light up.

d)

It will blink.

43.

The circuit shown is known as a (a)   circuit.

44.

A bulb in Sara's kitchen has blown up. Immediately all bulbs in Sara's house stopped working. The circuit in Sara's house is most probably ................ .

a)

a series circuit.

b)

over used.

c)

a parallel circuit.

d)

very old.

45.

Th diagram is showing a ................. circuit .

a)

series

b)

parallel

46.

Choose the wrong statement regarding the circuit shown.

a)

All the bulbs have the same brightness.

b)

All the bulbs have different brightness.

c)

When one bulb spoils the others will not light up.

d)

The switch breaks and completes the circuit.

47.

Normally, when one of these bulbs spoil, the others also do not work. They are most probably fixed in .......................

a)

series

b)

parallel

48.

Is this picture describe the logic of series circuits?

a)

YES

b)

NO

49.

Is this picture describe the logic of parallel circuits?

a)

YES

b)

NO

50.

Is this picture describe the logic of parallel circuits?

a)

YES

b)

NO

51.

What is TRUE about the parallel circuits?

a)

A closed circuit where there is more than one path for electrons to flow through.

b)

There are three possible paths, electrons can flow to bulb 1, 2 or 3.

c)

If one bulb goes out, the other ones will not be affected.

d)

The part of a circuit where it braches off is called a junction point

e)

Think about a waterslide park with one slide closed. The kids can still get to the bottom by taking another slide.

52.

What is true about the series circuits?

a)

When electrons have only one path to follow (like a single slide at a water park)

b)

If a person stops the current stops, if they close the slide (open a switch) the current will no longer flow.

c)

A circuit with only one path to follow.

d)

A circuit with several paths to follow.

53.

Solve for the total resistance of the circuit shown

a)

50 V

b)

1970 ohms

c)

705 K ohms

d)

20 Amps

54.

What unit is used to measure current?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

55.

What unit is used to measure resistance?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

56.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
57.

This states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.

a)

Kepler's Law

b)

Law of gravity

c)

Ohm's Law

d)

Thermodynamics Law

58.

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.

a)

60Ω

b)

120Ω

c)

180Ω

d)

240Ω

59.

Speakers need a household voltage of 110 V to push a current of 5.5 A through them. What is the

resistance of the speakers?

a)

10Ω

b)

20Ω

c)

30Ω

d)

40Ω

60.

An IPod uses a standard 1.5 V battery. How much resistance is in the circuit if it uses a current of 0.01A?

a)

50Ω

b)

100Ω

c)

150Ω

d)

200Ω

61.

A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.

a)

0.5A

b)

1A

c)

1.5A

d)

2A

62.

What current flows through a hair dryer plugged into a 120 Volt circuit if it has a resistance of 25 ohms?

a)

2.4A

b)

3.6A

c)

4.8A

d)

6A

63.

If a toaster produces 12 ohms of resistance in a 120-volt circuit, what is the amount of current in the

circuit?

a)

5A

b)

10A

c)

15A

d)

20A

64.

A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much current

is passing through the circuit?

a)

1A

b)

1.2A

c)

1.4A

d)

1.6A

65.

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of

resistance?

a)

10V

b)

50V

c)

100V

d)

150V

66.

An electric heater works by passing a current of 100 A though a coiled metal wire, making it red hot. If the

resistance of the wire is 1.1 ohms, what voltage must be applied to it?

a)

70V

b)

90V

c)

110V

d)

130V

67.

A light bulb has a resistance of 5 ohms and a maximum current of 10 A. How much voltage can be applied

before the bulb will break?

a)

5V

b)

10V

c)

25V

d)

50V

68.

What is the potential difference across an electrical load that has a resistance of 4 Ω and a current of 3 A flowing through it?

a)

4V

b)

8V

c)

12V

d)

16V

69.

Calculate the current an electric clothes dryer draws when it is connected to a 230 V source and has a resistance

of 9.2 Ω.

a)

5A

b)

15A

c)

25A

d)

35A

70.

A portable radio connected to a 9.0 V battery draws a current of 25 A. What is the resistance of the radio?

a)

0.036Ω

b)

0.36Ω

c)

3.6Ω

d)

36Ω

71.

What type of energy is the electrical energy from the battery being converted into in this radio?

a)

Heat and light

b)

Sound and light

c)

Sound and heat

d)

Potential energy

72.

How much resistance does a heavy duty flashlight have if it has a current of 25 mA flowing through it and is being

powered by four 1.5 V cells?

a)

0.15Ω

b)

1.5Ω

c)

15Ω

d)

150Ω

73.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
74.

The mathematical relationship among Voltage, Current, and Resistance

a)

Faraday's Law

b)

Tesla's Law

c)

Edison's Law

d)

Ohm's Law

75.

According to Ohm's Law, if you were to triple the voltage of a circuit without changing the resistance, what would happen to the flow of current?

a)

It would stay the same

b)

It would increase by 2x

c)

It would increase by 3x

d)

It would decrease by 3x

76.

According to Ohm's Law, if you were to double the voltage and double the resistance, what would happen to the flow of current?

a)

It would stay the same

b)

It would increase 2x

c)

It would increase 4x

d)

It would decrease 2x

77.

Using Ohm's Law Triangle, What is the formula to calculate the Voltage (V)?

a)

V = IRV\ =\ \frac{I}{R}

b)

V = RIV\ =\ \ \frac{R}{I}

c)

V = I ×RV\ =\ I\ \times R

78.

Using Ohm's Law Triangle, What is the formula to calculate the Current (I)?

a)

 I = VRI\ =\ \frac{V}{R}  

b)

 I = V × RI\ =\ V\ \times\ R  

c)

 I = RVI\ =\ \frac{R}{V}  

79.

Using Ohm's Law Triangle, What is the formula to calculate the Resistance (R)?

a)

 R = IVR\ =\ \frac{I}{V}  

b)

 R = VIR\ =\ \frac{V}{I}  

c)

 R = V × IR\ =\ V\ \times\ I  

80.

Calculate the voltage for the circuit shown.

a)

V = 0.8 vV\ =\ 0.8\ v

b)

V = 1.25 vV\ =\ 1.25\ v

c)

V = 9 vV\ =\ 9\ v

d)

V = 20 vV\ =\ 20\ v

81.

Calculate the current for the circuit shown.

a)

 I = 0.05 AI\ =\ 0.05\ A  

b)

 I = 20 AI\ =\ 20\ A  

c)

 I = 105 AI\ =\ 105\ A  

d)

 I = 500 AI\ =\ 500\ A  

82.

Calculate the resistance for the circuit shown.

a)

R = 0.17 ΩR\ =\ 0.17\ Ω

b)

R = 6 ΩR\ =\ 6\ Ω

c)

R = 35 ΩR\ =\ 35\ Ω

d)

R = 150 ΩR\ =\ 150\ Ω

83.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
84.

Ammeters should always be connected in (a)   .

85.

What is the missing value on the ammeter?

(a)  

86.

Potential difference is another word for (a)   .

87.

Voltmeters should always be connected in (a)   around a component.

88.

What does a voltmeter measure?

a)

Current

b)

Voltage

c)

Resistance

89.

What does an ammeter measure?

a)

Current

b)

Voltage

c)

Resistance

90.

How does an ammeter is added in the circuit?

a)

Series

b)

Parallel

91.

How does a voltmeter meter is added in the circuit?

a)

Series

b)

Parallel

92.

An ammeter must have

a)

Low resistance so that it does affect the current through the main circuit

b)

High resistance so that it does affect the current through the main circuit

c)

Low resistance so that it does affect the voltage across the resistor

93.

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

a)

Negative.....negative

b)

Negative....positive

c)

Positive......negative

d)

Positive....positive

94.

SI unit of current is

a)

ampere

b)

metre

c)

ohm

d)

volt

95.

SI unit of voltage is

a)

ampere

b)

metre

c)

ohm

d)

volt

96.
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
97.

The table describes four different resistance wires.


They are all made from the same metal.


Which wire has the smallest resistance?

a)

A

b)

B

c)

C

d)

D

98.

The circuit shown contains a battery, a 6.0 Ω resistor and two meters X and Y.


One meter records current and one meter records potential difference.

a)

meter X : 2.0 A

meter Y : 12.0 V

b)

meter X : 2.0 V

meter Y : 1.0 A

c)

meter X : 12.0 A

meter Y : 2.0 V

d)

meter X : 12.0 V

meter Y : 2.0 A

99.

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

a)

Negative.....negative

b)

Negative....positive

c)

Positive......negative

d)

Positive....positive

100.

In the circuit, the bulb lights up because there is ............... flowing in the closed circuit.

a)

battery

b)

current

c)

resistance

d)

voltage

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