1. Define Knee Voltage? Ans. - Knee voltage is the forward voltage at which the flow of the current through the PN junction of the diode increases rapidly. 2. What is Rectification? Ans. - The process in which the alternating current is converted into direct current is called Rectification. A diode can be used as a rectifier. 3. Writedown the fullform of MOSFET and types of MOSFET? Ans. - MOSFET – Metal Oxide Semiconductor Field Effect Transistor. MOSFET is of two types. i) Depletion Type ii) Enhancement Type Both are of two types N channel and P channel. 4. Define α and β? Ans. – α is defined as the ratio between collector current and emitter current. ∆𝑰𝒄 I.e. α = ∆𝑰𝒆 β is defined as the ratio between collector current and base current. ∆𝑰𝒄 β = ∆𝑰𝒃 5. What is Zener diode and where it is used? Ans. – Zener diode is the special type of diode which is made for operation in reverse bias condition. It is used for voltage regulator and clipping circuit. 6.