Motional electromotive force

Question based on Motional Electro motive force (emf)

In p -n junction photocell electromotive force due to monochromatic light is proportional to

In a p-n junction photo cell, the value of the of the photo electromotive force produced by monochromatic light is proportional to

In a p-n junction photo cell, the value of the photo electromotive force produced by monochromatic light is proportional to

Explain electromotive force.

What is electromotive force of a cell?

Unit of electromotive force is