Chapter 25, Problem 69A

To determine

To Explain: What makes it impossible for the output power in a transformer to equal input power, as long as the core has eddy current.

Explanation of Solution

Introduction:

Eddy currents are circulating currents in the magnetic materials. These occur when a conductor is placed in the influence of a changing magnetic field. Eddy current results in loss of power of the transformer.

As the transformer experiences loss of power in the form of thermal energy, the output power of cannot be equal to the input power because of the law of conservation of energy. As per this law, energy can neither be formed nor be destroyed. It can only be changed from one type to another.

Conclusion:

As the transformer experiences loss of power in the form of thermal energy the output power of cannot be equal to the input power because of the law of conservation of energy.