What is the principle of a transformer?

What is efficiency of a transformer?

What is the principle used for transmitting audio and video signals using optical fibre? Explain the principle.

Thickness of insulated copper wire used in ihe primary turns and secondary turns ofa transformer are not equal. Write down the working principle of transformer.

What is the basic principle of tissue culture?

What is the working principle of a moving coil galvanometer?

Nuclear fusion reaction Is responsible for energy generation in stars. What is the principle behind a nuclear reactor