(a)What do you mean by potential barrier for a p-n junction? (b)What is the significance of negative resistance of a tunnel diode (c) Define peak inverse voltage (PIV). (d) Explain FWR working principle with circuit and waveforms. (e) What are the three regions of a Transistor? (f) What is thermal runway? how can it avoided? (g)What is faithful amplification? (h) How , and y are related to each other? (i)Define the pinch off voltage (Vp) sketch the depletion region before and after pinchoff? (j) Derive Expression for saturation drain current