Q23.3-9CQ An induction stove heats a pot w... [FREE SOLUTION]

Chapter 23: Q23.3-9CQ (page 858)

An induction stove heats a pot with a coil carrying an alternating current located beneath the pot (and without a hot surface). Can the stove surface be a conductor? Why won鈥檛 a coil carrying a direct current work?

Short Answer

Expert verified

An induction stove's surface cannot be a conductor, and DC will not work because constant current intensity does not cause induction.

Step by step solution

Definition of conductor

A conductor is an object or material that allows a charge to flow in one or more directions. Metal materials are common electrical conductors.

Explanation

A stove's surface cannot be a conductor. As a result, the entire surface would heat up, wasting energy.

When an induction stove is turned on, the coil beneath the surface generates a constantly changing magnetic field that penetrates the surface of a metal (or otherwise conducting) pan, creating eddy currents in the material. These currents, in turn, will generate heat and warm your food. As a result, only the area where the pan was heated becomes hot, while the rest of the surface remains cold.

A DC-carrying coil will not work because DC will only induce one cycle. The current intensity would jump from 0 to some constant value, so there would be no significant heat after that jump.