(i)

Single stroke/single touch

(ii)

A → South pole
B → North pole

(iii)

How to test that the bar AB is a magnet

1. The bar suspended horizontally at its midpoint will be in the North-South direction when at rest
2. Suspend AB freely at its midpoint. One pole of a known magnet brought at a time to the ends A and B will show both attraction and repulsion for both ends
3. The bar AB is brought close to a plotting compass. The compass shows deflection
4. Dip the ends A and B of the bar into iron filings. Iron filings will cling to the poles/magnetic substances are attracted by both ends of the bar

(iv)

How to test for the poles of A and B of the bar

1. South pole of a magnet is brought towards end A of the bar and there is repulsion between them
2. A north pole of a magnet is brought towards end B of the bar and there is repulsion between them

(v)

Precautions that should be taken during the magnetization process

1. The magnet should be drawn along the bar AB in only one direction
2. The magnet should be lifted way off the bar AB at the end of each stroke

(vi)

Other methods of magnetization

1. Divided touch/double touch/double stroke
2. Electrical method/electromagnetisation
3. Induction
4. Hammering

(i)

I → Cell/emf source/battery
II → Key/switch
III → Coiled wire/solenoid

(ii)

Substances that can be made into a magnet

1. Cobalt/Co
2. Nickel/Ni
3. Iron/Fe/Nail
4. Steel
5. Duralumin

(iii)

Other methods of making magnets

1. Single touch/Single stroke
2. Divided touch/Divided stroke/Double touch/Double stroke
3. Hammering a red hot metal lying in north-south direction
4. Induction

(iv)

Materials that are used in making an electrical wire

1. Copper
2. Silver
3. Aluminium

(v)

Properties of the materials that is used in making an electrical wire

1. It is ductile/can be drawn into wires
2. It is malleable
3. It has high electrical conductivity/it is a good conductor of electricity/it has low resistivity/it has low resistance
4. It has high tensile strength/cannot break easily