Thermoelectricity Demo
Large view | Product Details | Related Products |
Product Number: SB43532M Price: $27.50 |
PRODUCT DETAILS
This little demo is based on an effect discovered by Thomas Johann Seebeck in 1821 while experimenting with a loop of wire made of copper and bismuth. The heat from his hand was enough to produce a current that deflected a nearby magnetic compass. A thermoelectric loop has two wires of different metals connected at two junctions. If the junctions are at different temperatures, a current passes through the loop they form, indicating the presence of a thermal emf. Demo has aluminum and copper strips formed so that a compass can be placed inside it. Heat one end with a heat gun or bunsen burner and the needle on the compass will deflect instantly. Cool the end with ice and the needle will swing the other direction. Includes attached handle for safety and instructions with theory. Grades 6-12.
RELATED ITEMS
|
