Physics Is Attractive

1.

Multiple Select

30 sec

1 pt

Which materials are magnetic

Iron

Steel

Nickel

Cobalt

Copper

2.

Multiple Select

30 sec

1 pt

Which magnets will '1' repel?

1

2

3

4

3.

Multiple Choice

30 sec

1 pt

Magnets 1 & 2 will....

Attract

Repel

4.

Multiple Choice

30 sec

1 pt

Magnets 3 & 4 will...

Attract

Repel

5.

Multiple Select

30 sec

1 pt

If the brown block is attracted in both arrangements then...

It can't be a magnet

It can't be magnetic

It must be magnetic

It might be made of iron

6.

Multiple Choice

30 sec

1 pt

This process can be used to make a bar magnet. A suitable material to use would be...

Iron

Steel

Copper

Brass

7.

Multiple Choice

30 sec

1 pt

The north pole of this magnet is at...

A

B

8.

Multiple Choice

30 sec

1 pt

You can tell the magnetic field is strongest at the poles (A&B) because...

The field lines are closer together there

The arrows come from the poles

The field lines end there

9.

Multiple Select

30 sec

1 pt

You can find the shape of a field around a bar magnet using...

Iron filings

Plotting Compasses

10.

Multiple Select

30 sec

1 pt

You can find the direction of the magnetic field around a bar magnet using...

Iron Filings

Plotting Compasses

11.

Multiple Choice

30 sec

1 pt

The poles should read from left to right...

N S / N S

N S / S N

S N/ N S

S N / S N

12.

Multiple Choice

30 sec

1 pt

These magnets are...

attracting

repelling

13.

Multiple Choice

30 sec

1 pt

These magnets are...

Attracting

Repelling

14.

Multiple Choice

30 sec

1 pt

The poles should read from left to right...

NS/ NS

NS / SN

SN / NS

SN / SN

15.

Multiple Choice

30 sec

1 pt

A plotting compass placed at the 'X' will point...

Up

Down

Left

Right

16.

Multiple Choice

30 sec

1 pt

A plotting compass placed away from magnets and magnetic materials will point...

Up

Down

Left

Right

North

17.

Multiple Choice

30 sec

1 pt

When a magnetic material is placed in a magnetic field its domains...

Align with the field

Do nothing

Stay jumbled up

18.

Multiple Choice

30 sec

1 pt

A soft magnetic material has domains that...

Align with a magnetic field and then become misaligned when the field is gone

Stay aligned with the magnetic field even after the field is removed.

19.

Multiple Select

30 sec

1 pt

Hard magnetic materials have...

Domains that remain aligned after the magnetic field is removed

the ability to retain their magnetism

No iron, nickel or cobalt in them

20.

Multiple Select

30 sec

1 pt

Which of these are hard magnetic materials?

Iron

Steel

Brass

Copper

21.

Multiple Choice

30 sec

1 pt

The shape of the magnetic field around an electromagnet looks like....

A rectangle

A coil

The same shape as the field around a bar magnet

22.

Multiple Select

30 sec

1 pt

To make an electromagnet you need...

An iron core

A coil

Some iron filings

A cell or battery

23.

Multiple Select

30 sec

1 pt

To make an electromagnet stronger you could...

Increase the coils

Increase the turns on the coil

Try it without a core

Increase the current in the wires

24.

Multiple Select

30 sec

1 pt

To measure the strength of an electromagnet you could...

See how many paperclips it can pick up

See the mass of iron filings it can pick up

See how many volts it uses

See how hot it gets after 10 seconds

25.

Multiple Select

30 sec

1 pt

Electromagnets don't use steel as a core material because...

It's expensive

It rusts

It's magnetically hard, so the magnet remains attracted to magnetic materials when it's switched off.

26.

Multiple Select

30 sec

1 pt

Electromagnets are used in...

Scrapyard cranes

Electric door locks

Compasses

Heaters

27.

Multiple Choice

30 sec

1 pt

When it's switched on this electromagnet can pick up 5 paperclips. When it's switched off how many paperclips will it hold?

0

1

3

5

28.

Multiple Select

30 sec

1 pt

This electromagnet has a steel core and is switched on for a few minutes, when it's switched off what will happen to the steel core?

Nothing

It will be like a bar magnet

It will get hot

It will still hold some paperclips

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