Can we do any work without transfer of energy ?

Rate of doing work or rate of transfer of energy is defined as ……………

Power is defined as P) rate of doing work Q) rate of transfer of energy R) sum of kinetic and potential energy

Is there any device by which direct current can be controlled without any loss of energy ? Can a choke coil do so?

Answer the following questions: Explain the statement, "work is done due to transfer of energy."

Given any one difference between heat and work in terms of energy transfer.

How do we control AC without much loss of energy?

Can a body have energy without having momentum. Can a body have momentum without having energy ? Explain .