EASY
12th Andhra Pradesh Board
IMPORTANT
Earn 100

What do you mean by doping?

 

Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits

MEDIUM
12th Andhra Pradesh Board
IMPORTANT

Elucidate the formation of a N-type and P-type semiconductors.

 

EASY
12th Andhra Pradesh Board
IMPORTANT

What is an n-type semiconductor? What are the majority and minority charge carriers in it?

EASY
12th Andhra Pradesh Board
IMPORTANT

What is a p-type semiconductor? What are the majority and minority charge carriers in it?

EASY
12th Andhra Pradesh Board
IMPORTANT

What are n-type and p-type semiconductors? How is a semiconductor junction formed?

EASY
12th Andhra Pradesh Board
IMPORTANT
Are the n -type and p -type materials electrically neutral? Explain.
HARD
12th Andhra Pradesh Board
IMPORTANT
Draw the energy band diagrams of p -type and n -type semiconductors. 
EASY
12th Andhra Pradesh Board
IMPORTANT

Pure silicon at 300 K has equal electron and hole concentration of 1.5×1016 m-3. Doping by indium increases the hole concentration to 4.5×1022 m-3. Calculate the new electron concentration in the doped silicon.

EASY
12th Andhra Pradesh Board
IMPORTANT

A semiconductor has equal electron and hole concentrations of  6×108 m-3. On doping with certain impurities, electron concentration increases to 9 x 1012 m-3. Calculate the hole concentration.