HARD
12th ICSE
IMPORTANT
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Draw a labelled circuit diagram of common emitter amplifier. Explain the recombination of holes and electrons at junctions and write phase relationship between input and output voltages.

Important Questions on Junction Transistors

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 1
Name the three parts of transistor.
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 2
What are the functions of emitter, base and collector in a transistor?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 3
What are the current-carriers inside and outside the transistor circuit in p-n-p transistor? What in n-p-n transistor?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 4
Which one of the transistors p-n-p and n-p-n is more useful and why?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 5

Which type of transistor is shown in the given figure? In this there are two p-n junctions (i) between the emitter and the base and (ii) between the base and the collector. Which one of these is forward-biased and which is reverse-biased?

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HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 8
What kinds of biasings are required to the collector and base of a transistor in a common-emitter amplifier?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 9
What is the relation among emitter-current, base- current and collector-current at any instant in a  properly-biased common-emitter transistor circuit? Which one of the three currents has smallest magnitude?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 20 - Junction Transistors>QUESTIONS>Q 10
What is the relation for the voltage gain in terms of transconductance in a transistor amplifier?