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Ch. 24 quiz Magnetism and circuits

Total questions: 47

Worksheet time: 2hrs 32mins

Name
Class
Date
1.

Which two metals will be attracted by a magnet?

a)

iron and steel

b)

gold and silver

c)

aluminum and lead

d)

copper and cobalt

2.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
3.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
4.
This large crane magnet functions only when the electrical current is ON.  The crane magnet is an example of what type of magnet?
a)
NIB Magnet
b)
Ceramic Magnet
c)
Electromagnet
d)
funnel magnet
5.

Iron, Nickel and cobalt are all __________________ materials

a)

Shiny

b)

poles

c)

magnetic

d)

cold

6.

What characteristics do magnetic substances have?

a)

They can give you a "shock" when you touch them

b)

They can push or pull objects without touching them

c)

They are always black and cold to touch

d)

They fall faster than other objects when you drop them

7.

On Earth, where is Magnetic North approximately located?

a)

The Equator

b)

The North Pole

c)

The South Pole

d)

New Brighton

8.
If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?
a)
Clockwise
b)
Counter-clockwise
c)
It will not move
d)
Need more information
9.
Which direction is the North Pole of this electromagnet?
a)
Right
b)
Left
c)
Up
d)
Down
10.
Which direction is the North Pole of this electromagnet?
a)
Right
b)
Left
c)
Up
d)
Down
11.
Where could you hold a south pole of a permanent magnet to get the rotor to move counter-clockwise?
a)
A & B
b)
B & C
c)
A & C
d)
B & D
12.
What percent of the electricity produced in the US in 2007 comes from renewable resources?
a)
1.6%
b)
3.1%
c)
8.9%
d)
51.5%
13.
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.
14.
The total resistance in this circuit is 
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
15.
The total current through this circuit is
a)
0.02 amps
b)
0.09 amps
c)
50 amps
d)
9 amps
16.
The voltage dropped across the 300 ohm resistor is 
a)
6 V
b)
9 V
c)
2 V
d)
30 V
17.

What is the total resistance (RT) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

18.

As resistors are added in series to a circuit, the total resistance will...

a)

increase

b)

decrease

c)

stay the same

19.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
20.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
21.
If you replace the paper clip with a plastic spoon, what happens?
a)
The bulb doesn't light
b)
The bulb is dimmer
c)
The wires get hot
d)
There is no change
22.
Which statement is true?
a)
The light bulb will light up because the  circuit is complete.
b)
The light bulb will light up because the  circuit is broken.
c)
The light bulb will not light up because the  circuit is complete.
d)
The light bulb will not light up because the  circuit is broken.
23.
What kind of circuit is this?
a)
series
b)
parallel
24.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
25.

Why 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

26.

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

27.
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
28.
Which of the following can work as an energy source?
a)
Battery
b)
Light bulb
c)
Wire
d)
All of them
29.
Which bulbs will light?
a)
1 and 2
b)
2 and 3
c)
3 and 4
d)
4 and 2
30.
An outlet in a wall and a battery are examples of __________.
a)
Power source 
b)
Load
c)
Energy pathway
d)
ALL of them 
31.
A device that uses electricity. 
a)
Load 
b)
Battery Source
c)
Energy pathway
32.
Electrons need a GOOD PATH made of a ______ for them to flow. 
a)
Conductor
b)
Insulator
33.
___________ wires keep electrons on course & protect us from the dangerous flow of electricity. 
a)
Insulated
b)
Conducted
34.
From this picture which is the conductor and which is the insulator? 
a)
Conductor: yellow wire, Insulator: black wire
b)
Insulator: yellow wire, Conductor: black wire
35.

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

36.

A person’s body is thrown outward as a car rounds a curve on a highway.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

37.

Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

38.

A picture is hanging on a wall and does not move.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

39.

Pushing a child on a swing is easier than pushing an adult on the same swing, because the adult has more inertia.

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

None of them

40.

Which law is this picture an example of?

a)

Law of Inertia

b)

Law of Force and Acceleration

c)

Law of Action / Reaction

41.
How much force is needed to accelerate a 3kg skateboard at 5m/s2. 
a)
8N
b)
1.6N
c)
0.6N
d)
15N
42.
How much force is needed to accelerate a 25kg bowling ball at 2m/s2. 
a)
50N
b)
5N
c)
12.5N
d)
100N
43.

What is voltage measured in?

a)

Ω (Ohms)

b)

V (Volts)

c)

A (Amps)

d)

W (Watts)

44.

What is current measured in?

a)

Ω (Ohms)

b)

V (Volts)

c)

A (Amps)

d)

W (Watts)

45.

What is resistance measured in?

a)

Ω (Ohms)

b)

V (Volts)

c)

A (Amps)

d)

W (Watts)

46.

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

a)

1 Ohm

b)

3 Ohms

c)

4 Ohms

d)

12 Ohms

47.

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

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