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TEST KEEP CLOSED

THERMAL PROPERTIES OF MATTER

Thermal Expansion

Thermal Conductivity

Internal Resistance of a Battery

The internal resistance of a battery is determined by measuring the terminal voltage as a function of load resistance. The terminal voltage drops by a factor of two, compared to the open circuit voltage, when the load resistance equals the internal resistance. A decade resistor box is used as the variable load. Current and voltage are measured on large display LED meters for easy viewing in a classroom.

Internal Resistance of a Battery