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THERMAL PROPERTIES OF MATTER

Thermal Expansion

Thermal Conductivity

DC Motor

This is a demonstration of torque on a current loop in a magnetic field. A coil of wire with a split ring commutator is mounted between the poles of a large permanent magnet, and connected to a 12 volt variable DC power supply. The speed of the motor depends on the current and upon the strength of the magnetic field.

Magnetic Torque on a Current Loop