MEDIUM
12th West Bengal Board
IMPORTANT
Earn 100

Name the charge carriers in the following at room temperature.

(iii) insulators. 

Important Questions on Electronic Devices

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 11

How does the resistance of a semiconductor change with rise of temperature ?

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 12
Doping of silicon with indium to which type of semiconductor. 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 13
What is the ratio of the number of holes and number of conduction electrons in an intrinsic semiconductor ?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 14
Is the ratio of number of holes and number of electrons in an n−type extrinsic semiconductor more than, less than or equal to 1?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 15
What type of charge carriers are there in an n-type semiconductor?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 16
How does the collector current change in a junction transistor, if the base region has larger width?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 18
Draw the voltage‐current characteristic of a zener diode.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 20

Why is the conductivity of a n-type semiconductor greater than that of p-type semiconductor even when both of these have same-level of doping?