What is barrier potential?

Figure Shows a diode connected to an external resistance and an e.m.f. Assuming that the barrier potential developed in diode is 0.5 V, obtain the value of current in the circuit in milliampere.

What is water potential?

What is the water potential of pure water at atmospheric pressure?

What is solute potential?

Explain how the depletion layer and barrier potential are formed in pn junction diode ?