Simple Magnetism and Magnetic Fields
72 questions· page 1 of 8
Three pieces of equipment made of magnetic materials are listed.
- the core of a transformer
- the needle of a compass
- iron filings used to show a magnetic field pattern
Which pieces of equipment act as temporary magnets when in use?
Options
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
A bar magnet is placed on a sheet of paper.
The diagram shows the field lines due to the magnet.
A soft-iron bar is placed on the paper on the rectangle marked WZ. The soft-iron bar becomes an induced magnet.
What are the magnetic poles at the ends of the soft-iron bar?
Options
| pole at W | pole at Z | |
|---|---|---|
| A | N | N |
| B | N | S |
| C | S | N |
| D | S | S |
Magnets , and are joined by iron balls W, X and Y as shown.
Magnetic poles are induced in the iron balls W and X as shown.
Which diagram shows the poles induced in ball Y?
Options
A compass is placed close to a strong bar magnet and pivots to the position shown.
Which type of magnet is a compass needle and what is pole X?
Options
A The needle is an induced magnet and X is a north magnetic pole.
B The needle is an induced magnet and X is a south magnetic pole.
C The needle is a permanent magnet and X is a north magnetic pole.
D The needle is a permanent magnet and X is a south magnetic pole.
The diagrams show an iron nail in four different situations.
In which diagram is the nail an induced magnet?
Options
Which row correctly shows a magnetic metal and a non-magnetic metal?
Options
| magnetic metal | non-magnetic metal | |
|---|---|---|
| A | aluminium | copper |
| B | copper | steel |
| C | iron | copper |
| D | steel | iron |
A freely suspended magnet is held perpendicular to a uniform magnetic field as shown. The magnet is viewed from above.
What happens to the magnet when it is released?
Options
A It turns through 90° clockwise and then stops moving.
B It turns through 90° anticlockwise and then stops moving.
C It turns through 90° clockwise and moves towards U.
D It turns through 90° anticlockwise and moves towards V.
Bar magnets and various non-magnetic and demagnetised metal bars are placed in the different arrangements shown.
In which arrangement do the bars repel?
Options
A student uses a wooden clamp and a stand to hold a freely suspended bar magnet.
The diagrams show that:
- in experiment 1, the student holds a bar magnet next to the suspended magnet
- in experiment 2, the student holds an iron bar next to the suspended magnet
- in experiment 3, the student holds a steel bar next to the suspended magnet.
In which experiments does the suspended magnet move?
Options
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
What proves that a metal bar is a permanent magnet?
Options
A It attracts both ends of a compass needle.
B It attracts one end of another magnet.
C It conducts electricity.
D It repels one end of another magnet.