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Worksheets

Electricity & Magnetism Basics

Total questions: 88

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

What is electricity?

a)

An invisible force that we don't understand.

b)

An invisible force that relies on the movement of electrons.

c)

A force that can be used for human activities.

2.

What are the moving particles that move to create an electrical current?

a)

Protons

b)

Neutrons

c)

Atoms

d)

Electrons

3.

Which type of circuit does this represent?

a)

Parallel

b)

Series

4.

Pick all the materials that would be a conductor.

a)

Metal frying pan

b)

Rubber

c)

Plastic

d)

Copper wire

e)

Stainless Steel

5.

Which of these is an insulator?

a)

Rubber

b)

Copper penny

c)

Iron nail

d)

Plastic

e)

Cloth

6.
___ Law says that the Induced current is proportional to the change of magnetic flux 
a)
Lenz'
b)
Faraday's
c)
Ampere's
7.
Find the direction of the magnetic force.
a)
Into the screen
b)
Out of the screen
c)
Right
d)
Left
8.

Can you produce current in a wire with a magnet that is sitting still?

a)

Yes; having a magnet near a wire is enough to excite the electrons

b)

No; the magnetic field has to be changing to excite the electrons

c)

No; magnets cannot create electricity

9.

A coil spins in a magnetic field. Of the following

which causes an increase in the induced EMF in

the coil?

a)

Spinning the coil faster

b)

Removing the coil from the magnetic field

c)

Keeping the flux at a constant rate

d)

Decreasing the number of turns of wire in

the coil

10.
Voltage can be induced in a wire by
a)
a. moving the wire near a magnet.
b)
b. moving a magnet near the wire.
c)
c. changing the current in a nearby wire.
d)
d. all of these
11.
What would happen if I move a bar magnet in and out of a coil of copper wire?
a)
Electric current would disappear 
b)
The magnet would explode 
c)
Electric current will flow through the wire
d)
It would produce a gravitational field
12.
A magnet can move in a coil of wire to produce electricity in which system?
a)
Generator
b)
Motor
c)
Magnet
d)
Transformer
13.
What is the direction of the induced magnetic field?
a)
Left
b)
Right
c)
Up
d)
Down
14.
What is the direction of the induced magnetic field?
a)
Left
b)
Right
c)
Up
d)
Down
15.
In what direction is the magnet moving?
a)
Left
b)
Right
c)
Up
d)
Down
16.
In what direction is the magnet moving?
a)
Left
b)
Right
c)
Up
d)
Down
17.
A magnetic field exerts a force on a charged particle:
a)
always 
b)
never 
c)
if the particle is moving across the field lines
d)
if the particle is moving along the field lines 
18.
When do we have self induction?
a)
When the magnet moves into the coil
b)
When the coil moves into the magnet
c)
When a constant current passes through the coil
d)
When a changing current passes through the coil
19.
When current increases in a coil, the induced current will be
a)
in the same direction
b)
in the opposite direction
c)
clockwise
d)
counterclockwise
20.

What should RLC Circuit contains ??? (Choose all correct answers)

a)

Resistor

b)

Capacitor

c)

Inductor

d)

Transistor

21.

In a series circuit current must be

a)

constant for each element

b)

cosine graph in all 3 components

c)

different for each element

22.

In a series circuit voltage must be

a)

constant for each element

b)

cosine graph in all 3 components

c)

different for each element

d)

sine graph in all 3 components

23.
The period of a wave is
a)
the same as frequency
b)
time required to complete one cycle
c)
expressed in amperes
d)
none of the above
24.
In an RLC circuit, power loss can take place in
a)
R
b)
L
c)
C
d)
L and C
25.
wood is a _____?
a)
conductor
b)
insulator
26.
water is a______?
a)
conductor
b)
insulator
27.

This circuit has more than one path. When one light goes out, the others stay on.

a)

closed circuit

b)

series circuit

c)

parallel circuit

d)

open circuit

28.
What kind of circuit is this?
a)
series
b)
parallel
29.
What type of circuit is show in the image?
a)
Series Circuit
b)
Parallel Circuit
30.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
31.
When all parts of the circuit are connected it is a ______ circuit. 
a)
open
b)
closed
32.
When you flip a light switch on and off you are closing and opening a circuit.
a)
true
b)
false
33.
What is a Parallel circuit? 
a)
Has only one path 
b)
Has more than one path 
c)
Allows energy to travel through easily 
d)
Has only one light bulb
34.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
35.
Which best describes a simple series circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from the switch.
c)
Electricity flows along many pathways.
d)
The flow of electricity comes from the light bulb.
36.

Why is electrical wiring usually are covered with a layer of plastic?

a)

To make it look pretty

b)

To help electricity flow along the wire

c)

To make it safe

d)

To add more energy

37.

Why is electrical wiring usually made from copper?

a)

Because copper is shiny

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulate electricity

38.
An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —
a)
Point D to Point C
b)
Point B to Point C
c)
Point A to Point D
d)
Point B to Point D
39.
The electrician in this picture is wearing rubber gloves for protection.  The purpose of the rubber gloves is to --
a)
keep the electrician dry
b)
create an electrical circuit
c)
produce electricity
d)
protect the electrician
40.
What material would be safest to use as an insulator to cover electrical wires?
a)
rubber
b)
tin
c)
aluminum
d)
water
41.
Will the light bulb in this circuit light and why/why not?
a)
yes, because it has two batteries
b)
no, because the switch is open
c)
yes, because it is in a circuit
d)
no, because the bulb is burned out
42.
Is the following photo of an open circuit or closed circuit? 
a)
A closed circuit which allows electricity to flow
b)
An open circuit which does not allow electricity to flow
43.
What is a battery?
a)
switch
b)
power source
c)
insulator
44.

A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb?

a)

0.90 A

b)

0.36 A

c)

0.60 A

d)

2.0 A

45.
The potential difference that causes charges to move in a circuit is ___.
a)
voltage
b)
resistance
c)
current
d)
electric discharge
46.
An example of a voltage source is a _____.
a)
voltmeter
b)
battery
c)
resistance
d)
switch
47.

What is the total resistance of this circuit?

a)

0.18 Ω

b)

5.45 Ω

c)

60 Ω

d)

6000 Ω

48.

What is the total resistance of this circuit?

a)

0.012 Ω

b)

85.9 Ω

c)

400 Ω

d)

150 Ω

49.

What is the total resistance of this circuit?

a)

0.068 Ω

b)

14.6 Ω

c)

400 Ω

d)

200 Ω

50.

What is the total resistance of this circuit?

a)

200 Ω

b)

100 Ω

c)

0.063 Ω

d)

15.8 Ω

51.

What is the total resistance of this circuit?

a)

100 Ω

b)

200 Ω

c)

0.063 Ω

d)

15.8 Ω

52.

What is the total resistance of this circuit?

a)

25 Ω

b)

75 Ω

c)

100 Ω

d)

18.75 Ω

53.

What is the total resistance of this circuit?

a)

100 Ω

b)

1.09 Ω

c)

22.44 Ω

d)

33 Ω

54.

What is the total resistance in this circuit?

a)

18 ohms

b)

9.0 ohms

c)

4.2 ohms

d)

6.6 ohms

55.

Formula for inductive capacitance is...

a)

12πfC\frac{1}{2\pi fC}

b)

12πfL\frac{1}{2\pi fL}

c)

It does not exist

d)

2πfC2\pi fC

56.

Which wire has more resistance (long or short)?

a)
b)
57.

resistance is

a)

a force that attracts metal

b)

a force that allows electricity to pass easily

c)

a force that opposes the flow of electricity

58.

True or False: All materials have the same amount of resistance

a)

True

b)

False

59.

Changing the length and thickness of wire in a circuit will change ____________

a)

the strength of the current

b)

the voltage

c)

the pressure

60.

How do you calculate resistance?

a)

Current x Voltage

b)

Voltage x Power

c)

Voltage ÷ Current

d)

Current ÷ Voltage

61.

What happens to resistance when the length of the wire increases?

a)

Stays the same

b)

Increases

c)

Decreases

62.

Who is this?

a)

Captain America

b)

Thor

c)

Deadpool

d)

Antman

63.

What effect does a hotter temperature have on resistance?

a)

No effect

b)

Increases resistance

c)

Decreases resistance

d)

Stays the same

64.

What other factor of a wire could affect its resistance?

a)

Material its made of

b)

How shiny it is

c)

Colour

65.

What platform do witches and wizards have to take to get to Hogwarts?

a)

Platform 9 and 3/4

b)

Platform 9

c)

Platform 6 and 1/2

d)

Platform 3 and 2/4

66.

How do you calculate current from voltage and resistance?

a)

Current = voltage x resistance

b)

Current = resistance x power

c)

Current = voltage ÷ resistance

d)

Current = resistance ÷ voltage

67.

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

68.

When a conductor is moved to cut through the magnetic flux, an _______________ is produced.

a)

induced current

b)

electromotive force

c)

electromagnetic induction

d)

internal resistance

69.

The production of electric current by a changing magnetic field is called ____________________________________.

a)

induced current

b)

electromotive force

c)

electromagnetic induction

d)

internal resistance

70.

____________law states that the direction of the induced current is such that it always _______ ___ the change producing it.

a)

Lenz's Law, oppose

b)

Faraday's Law, oppose

c)

Lez's Law, follow

d)

Faraday's Law, follow

71.

Faraday’s Law states that the magnitude of the induced e.m.f. is _________________ to the rate of change of magnetic flux linkage with the solenoid.

a)

equal

b)

inversely proportional

c)

directly proportional

72.

The d.c generator and a.c generator make use of electromagnetic induction to produce _______________________

a)

force

b)

electricity

c)

energy

d)

power

73.

Which of the following increases frequency of AC?

a)

increasing number of turns on the coil

b)

using a stronger magnet

c)

rotating the coil faster

d)

increase area of the coil

74.

No EMF is induced when?

a)

When the wire is not moving

b)

When the wire is parallel to magnetic field direction

c)

When no lines are cut by the wire

d)

all of the above

75.

What unit is current measured in?

a)

Ohms (Ω)

b)

Amps (A)

c)

Volts (V)

d)

Watts (W)

76.

What unit is resistance measured in?

a)

Ohms (Ω)

b)

Amps (A)

c)

Volts (V)

d)

Watts (W)

77.

What unit is voltage measured in?

a)

Ohms (Ω)

b)

Amps (A)

c)

Volts (V)

d)

Watts (W)

78.

In V=IR, what does I stand for?

a)

Resistance

b)

Voltage

c)

Current

d)

Power

79.

What is the current of this circuit?

a)

30 amps

b)

.02 amps

c)

60 amps

d)

.08 amps

80.

What is the voltage of this circuit?

a)

2000 volts

b)

3800 volts

c)

1000 volts

d)

500 volts

81.

What is the current of this circuit?

a)

6 amps

b)

2 amps

c)

12 amps

d)

5 amps

82.

What is the current of this circuit? (Remember to add the resistance up)

a)

.1 amps

b)

.2 amps

c)

.3 amps

d)

.4 amps

83.

What is the current of this circuit? (Remember to add the resistance up)

a)

.01 amps

b)

.02 amps

c)

.03 amps

d)

.04 amps

84.

What is the symbol for power?

a)

V

b)

I

c)

R

d)

P

85.

What is the symbol for resistance?

a)

V

b)

I

c)

R

d)

P

86.

What is the symbol for current?

a)

V

b)

I

c)

R

d)

P

87.
As the number of resistors increase, the total resistance ___________ and the total current ____________
a)
Increase, decrease
b)
Decrease, increase
c)
Increase, increase
d)
Decrease, decrease
88.

Choose all options that are true

a)

When resistance increases, current decreases

b)

If voltage decreases, current decreases

c)

If voltage increases, resistance increases

d)

When current increases, resistance increases

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