What is solar cell ? Explain its working?

What is a solar cell?

What is a heat engine ? Explain its working principle . Define its efficiency.

A Solar Cell

Explain the working of LED.

What is solar cell ? State the principle and uses of a solar cell.

What is an air conditioner? Explain working and coefficient of performance of an air conditioner?

Draw the circuit diagram of a half-wave rectifier. Explain its working. What is the frequency of ripple in its output?

What is solar cell? Draw the symbol and State its use.

What is cell junction? Explain the different types of cell junctions.

What is Nanotechnology ?Explain its properties.