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Current, Voltage, and Resistance

Total questions: 65

Worksheet time: 43mins

Name
Class
Date
1.
Voltage is measured in __.
a)
volts.
b)
watts.
c)
coulombs. 
2.
The movement of electrons from atom to atom in a line results in a flow of _____. 
a)
amperage.
b)
electric current.
c)
electromagnetic connectors. 
3.

The diagrams above represent four pieces of copper wire at 20.oC. For each piece of wire, L represents a unit of length and A represents a unit of cross-sectional area.

The piece of wire that has the greatest resistance is

a)

wire 1

b)

wire 2

c)

wire 3

d)

wire 4

4.

The resistance of a circuit remains constant. Which graph best represents the relationship between the current in the circuit and the potential difference provided by the battery?

a)
b)
c)
d)
5.
Current is measured in....
a)
Amps 
b)
Volts
c)
Ohms
d)
Coulombs
6.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
7.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
8.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
9.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
10.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
11.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
 can still light up
c)
 will go out
d)
of the light bulbs burn out also
12.
How should you put in an Ammeter?
a)
In Parallel
b)
In Series
13.
Which of the two circuits would have the brightest bulbs? 
a)
A
b)
B
14.
In which of these two circuits is the current the same at all points? 
a)
A
b)
B
15.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
16.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
17.
Voltage is measured in __.
a)
volts.
b)
watts.
c)
coulombs. 
18.
A voltmeter should be placed ........... in a circuit
a)
in parallel
b)
in series
c)
in order
d)
upside down
19.
What would the voltmeter read
a)
1V
b)
2V
c)
3V
d)
6V
20.
Which Voltmeter will give the lowest reading?
a)
V1
b)
V2
c)
V3
21.
What does this circuit symbol represent?
a)
diode
b)
light-dependent resistor (LDR)
c)
lamp
d)
light-emitting diode
22.
What does this circuit symbol represent?
a)
diode
b)
light-dependent resistor (LDR)
c)
lamp
d)
light-emitting diode
23.
Correctly identify component A, B and C
a)
A = Switch, B= Cell, C= LDR
b)
A= Cell, B= Switch, C= Diode
c)
A= Switch, B= Lamp, C= Diode
d)
A= Switch, B= Cell, C= Diode
24.
Resistance is a measure of....
a)
the energy per unit charge in a circuit
b)
how hard it is for electrons to move through the circuit
c)
how hard it is for electrons to move through the battery
d)
the number of charge carriers in a circuit
25.
The ability of a metal to allow heat or electricity to pass through it.
a)
conductivity
b)
insulator
c)
mass
d)
density
26.

Which of the following aluminum wires would have the greatest resistance?

a)

3 cm in length and 2 cm in diameter

b)

6 cm in length and 2 cm in diameter

c)

9 cm in length and 2 cm in diameter

d)

12 cm in length and 2 cm in diameter

27.

Which of the following are a result of the resistance to current?

a)

Electric potential energy to be converted to other energy forms.

b)

A reduction in current.

c)

The wire to heat up.

d)

All of the above.

28.

How will increasing the amount of resistance in a circuit affect the current if the voltage remains constant?

a)

It will increase

b)

It will not change

c)

It will decrease

d)

It will cease

29.

If a light bulb burns out in a series circuit, the total current

a)

remains unchanged

b)

becomes zero

c)

is increased a little

d)

is decreased a little

30.
As the resistance of a circuit increases, the current will
a)
increase
b)
decrease
c)
stay the same
31.
Current has units: 
a)
kilowatt·hour 
b)
ampere 
c)
coulomb 
d)
volt 
32.
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. 
33.
What kind of circuit is this?
a)
series
b)
parallel
34.

In a parallel circuit, if one connection is broken, all of the connections stop working.

a)

True.

b)

False.

35.

What is the definition of electrical current?

a)

The opposition to the flow of electrons

b)

The rate of flow of charge

c)

The work done on each coulomb of charge

d)

Electrons moving around

36.
Resistance is measured in ___. 
a)
watts. 
b)
amps.
c)
ohms.
37.

What electrical component measures current?

a)

Thermistor

b)

Resistor

c)

Voltmeter

d)

Ammeter

38.

Which equation links current, charge flow, and time?

a)

Current = Time / Charge flow

b)

Charge flow = current x time

c)

Current = charge flow x time

d)

Time = charge flow x current

39.

A 3A current flows through a television. How long would it take for 1500C to flow through it?

a)

4500s

b)

500s

c)

50s

d)

450s

40.

How much charge flows through a wire in 80s if the current is a constant 5.4A?

a)

432C

b)

360C

c)

524C

d)

344C

41.

The current in a wire is 1.2kA. What is the current in Amps?

a)

120A

b)

12A

c)

0.12A

d)

1200A

42.

Select all units of current in the list below:

a)

mA

b)

C

c)

V

d)

A

e)

m

43.

How do you calculate resistance?

a)

Divide voltage by current

b)

Divide charge by current

c)

Multiply current by voltage

d)

Multiply voltage and current

44.

What is the resistance if the voltage is 10V and the current is 2A?

a)

20 Ω

b)

5 Ω

c)

12 Ω

d)

8 Ω

45.

What are the units for resistance?

a)

Ohms (Ω)

b)

Voltage (V)

c)

Amps (A)

d)

Charge (C)

46.

How do you measure potential difference in a circuit?

a)

Voltmeter

b)

Ammeter

c)

Thermistor

d)

Battery pack

47.

If the length of a wire increases, the resistance ____________

a)

a. decreases

b)

b. increases

c)

c. stays the same

d)

d. unknown

48.

What is the resistance if the current is 2A and the voltage is 10V?

a)

8 Ω

b)

20 Ω

c)

12 Ω

d)

5 Ω

49.
Which resistor will prevent the most current flow?
a)
1 ohm
b)
100 ohms
c)
1000 ohms
d)
0.5k ohms
50.

The total resistance in this circuit is

a)

100 ohms

b)

450 ohms

c)

400 ohms

d)

30 ohms

51.

How to you calculate the total resistance in a series circuit?

a)

R1 + R2+ R3

b)

R1 - R2 - R3

c)

1/R1 + 1/R2 + 1/R3

d)

R1 = R2 = R3

52.

What is the resistance if the current is 2A and the voltage is 10V?

a)

8 Ω

b)

20 Ω

c)

12 Ω

d)

5 Ω

53.

What equation links voltage, current and resistance

a)

V = IR

b)

V = CR

c)

V = I/R

d)

V = R/I

e)

V = C/R

54.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
55.
This is the circuit symbol for ...
a)
an AC current source
b)
a DC current source
c)
an ammeter
d)
a voltmeter
56.
This is the symbol for a _____?
a)
Fuse
b)
Resistor
c)
Heater
d)
Strip light
57.
What variable is a Coulomb the unit for?
a)
Charge
b)
Force
c)
Distance
d)
Mass
58.
The difference in electrical potential energy between two places is called
a)
resistance
b)
friction
c)
induction
d)
voltage
59.
Two identical lamps, L1 & L2, are connected to a constant voltage power supply. The voltage drop across L1 is 36V. What is the voltage of the power supply?
a)
18V
b)
36V
c)
6V
d)
72V
60.

in which circuit is the lamp brightest

a)

1

b)

2

c)

3

d)

All the same

61.

in which circuit is the lamp brightest

a)

1

b)

2

c)

3

d)

All the same

62.

As the diameter of a wire increases, the resistance of the wire will

a)

increase

b)

decrease

c)

stay the same

63.

Which resistor has the biggest voltage across it?

a)

2 Ω

b)

3 Ω

c)

4 Ω

d)

all have the same

64.

What effect do electrons flowing through a resistor have on the resistor.

a)

make it glow

b)

reduce it's resistance

c)

increase it's resistance

d)

heat it up

65.

If a circuit has two resistors in series both are 4Ω, what is the total resistance of the circuit?

a)

1Ω

b)

2Ω

c)

4Ω

d)

8Ω

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