2. (a) Which of these is a magnetic material? A aluminium B carbon C cobalt D copper (b) A student has - a power pack - a long piece of wire - a stiff card - iron filings Describe how the student could use this equipment to show the shape of the magnetic field produced by a current in the wire - Edexcel - GCSE Physics Combined Science - Question 2 - 2019 - Paper 1

To demonstrate the magnetic field shape:

1. Connect the long piece of wire to the power pack to allow current to flow through the wire.
2. Lay the stiff card flat on a surface.
3. Position the wire along the center of the card.
4. Sprinkle iron filings evenly over the card around the wire.
5. Gently tap the card to allow the iron filings to align along the magnetic field lines created by the current in the wire.
6. The alignment of the iron filings will show the circular magnetic field pattern around the wire.

To draw the magnetic field lines:

1. Start by drawing a line from the north pole to the south pole, indicating the direction of the magnetic field.
2. Next, draw two more equidistant vertical lines between the poles, maintaining parallel alignment.
3. Use arrows directed from the north to the south pole to clearly show the direction of the magnetic field.