Diode Functionality and Characteristics

The video tutorial explains the role of diodes in electronics, focusing on the PN junction diode. It covers the basics of semiconductors, including their classification and conductivity, with a focus on silicon. The process of doping to enhance conductivity is discussed, followed by the construction of a PN junction diode. The video also explains diode biasing, both forward and reverse, and the VI characteristics of diodes.

What is the primary function of a diode in an electronic circuit?

• To convert AC to DC

• To amplify signals

• To allow current to flow in one direction

• To store electrical energy

Which material is known for having very high electrical conductivity?

• Plastic

• Copper

• Germanium

• Silicon

What is the role of doping in semiconductors?

• To improve the conductivity of the semiconductor

• To increase the size of the semiconductor

• To decrease the temperature sensitivity

• To change the color of the semiconductor

What type of impurity is added to create a p-type semiconductor?

• Monovalent impurity

• Hexavalent impurity

• Trivalent impurity

• Pentavalent impurity

In a p-n junction diode, what is the region called where the p-type and n-type materials meet?

• Conduction region

• Barrier region

• Depletion region

• Junction region

What happens to the barrier potential when a diode is in forward bias?

• It remains the same

• It becomes zero

• It decreases

• It increases

In reverse bias, what prevents the flow of current through a diode?

• The diode's resistance

• The battery voltage

• The barrier potential

• The depletion region

What is the effect of increasing reverse voltage on a diode?

• It causes breakdown and increases current

• It increases the barrier potential

• It has no effect

• It decreases the current

Which characteristic of a diode describes the relationship between voltage and current?

• VI characteristics

• Voltage-current graph

• IV characteristics

• Current-voltage curve

What is the result of connecting a diode in forward bias?

• The diode is damaged

• The diode becomes an insulator

• No current flows

• Current flows easily