O-LevelPhysicsMagnetism5054/11 · May/June 2012 · Q341 Mark

A simple d.c. motor consists of a coil that rotates between the poles of a permanent magnet. The turning effect is increased by winding the coil on a metal cylinder. Which metals are used to make the magnet and the cylinder?

Airon copper

Biron steel

Csteel copper

Dsteel iron

✓ Correct answer

D: steel iron

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