E2 Slot

How do you find the mean free time between collision

Which of the following is True? (Multiple Answers are Right)

R-Recombination

• Rate of R of Holes and Rate of R of Electrons are equal

• Electrons and holes have different mass, but equal effective mass

• Under thermal equilibrium Rate of Generation = Rate of R

For a PN⁺ junction diode, which of the following is True?

• It is tough to operate in Reverse Bias

• Width of depletion region is more at P side

• Width of depletion region is more at N Side

• The depleted charges at P side is more than N side

Which of the following statement is wrong when u require to decrease the capacitance in a PN junction diode?

• Decrease the cross sectional area of the PN junction diode

• Decrease the Width of the depletion region

• Increase the width of the depletion region

• Increase the frequency of operation

How do you operate a common bases PNP transistor in cutoff mode?
EB-Emitter Base Junction, CB- Collector Base Junction

• EB- Reverse Bias
  CB- Reverse Bias

• EB- Forward Bias
  CB- Reverse Bias

• EB- Forward Bias
  CB- Forward Bias

• EB- Reverse Bias
  CB- Forward Bias

What are Depletion type MOSFET?

• Channels are already formed, enhance the drain current by applying gate voltage

• No channels are formed, Gate voltage is required to form a channel

• P type is enhanced to conduct drain current

• When drain voltage greater than gate voltage

Which of the following is the band diagram of inversion mode?

• 
• 
• 
• 

When does the emitter injection efficiency reaches its ideal value in BJT.

• Only one charge carrier current is present in the conduction

• Both Charge carrier(hole and electron) current are present during conduction

• When the Base current is Zero

• When the base junction is very small

What are the use of hall devices? (multiple Answers can be right)

• Find the mobility of a charge carrier

• Find magnetic response of the semiconductor

• Find the Carrier concentration in a semiconductor

• Find Hall voltage of the semiconductor

Which of the following is wrong with respect to direct band gap semiconductor? (multiple answers are right)

• Can be used in LED

• In E-K diagram, maximum energy level of the valence band are misaligned with the minimum energy level of the conduction band with respect to momentum.

• A direct recombination takes place with the release of the energy equal to the energy difference between the recombining particles.

• Silicon is an example of Direct band gap semiconductor