Question

Which of the following is/are correct regarding degraded energy?

• A. Degraded energy can no longer do work.
• B. When thermal energy is converted to mechanical or electrical energy, part of the thermal energy has to be expelled into the environment which is called as degraded energy.
• C. Degraded energy still exists but essentially can no longer be converted into mechanical or electrical energy.
• D. All of the above

Answer 1

The correct option is D All of the above

According to second law of thermodynamics when thermal energy is converted to mechanical energy .

Whole thermal energy cannot converted into mechanical energy some of its part expelled into the surrounding which is called as degraded energy and can no longer do work.

It exists but can no longer be converted into mechanical energy.