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Sandra Saju
Subject: Physics
, asked on 17/2/18
Q. Identify the logic operation carried out by the circuit shown below and write its truth table.
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
Solve this:
Q. Two semiconductor pieces X and Y of same length and equal area or cross-section are provided.
One of the materials is pure semiconductor and the other is doped.
(i) How will you identify the impure semiconductor from the two given pieces X and Y?
(ii) For a given rise in temperature what will be the relative charge in the behaviour of the two materials?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
the current gain of a transistor in common emitter arrangement is 20 find the voltage gain and the power again if the load resistance of output circuit is 40 kilo ohm and input resistance is 500 Ohm
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
Silicon semiconductor p-n junction diode has a barrier potential of 0.78 volt calculate the series resistance which should be connected to the PN junction so that it allows 1 milliampere current to flow in the circuit with a 5 volt battery used to provide forward bias to it?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
Solve this:
Q.16. The output of a 2 input NOR gate is fed as both inputs A and B to another NOR gate. Draw the logic circuit. Write the truth table for the final output for all possible combination of A, B. Identify the overall gate obtained.
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
why n type semiconductor is electrically neutral although number density of free electron in it is very large as compared to number density of holes
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
write the characteristic to be taken care of while doping in the semiconductor? justify your answer
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
the number of Dopant atoms added to pure semiconductor is generally very small and limited to few parts per million why?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
how does the forbidden energy gap of an intrinsic semiconductor vary with increase in temperature?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 17/2/18
what is the order of energy gap in metal ,semiconductor and insulator.
Answer
3
Shivam Sharma
Subject: Physics
, asked on 16/2/18
How do we get to know in such cases whether a diode is forward or reverse biased?
Q.30. (i) In the following diagram, is the junction diode forward biased or reverse biased?
Answer
1
Shivam Sharma
Subject: Physics
, asked on 16/2/18
Deduce the expression Ie= Ib + Ic in transistors.
Answer
1
Shivam Sharma
Subject: Physics
, asked on 15/2/18
Deacribe briefly how the motion of charge carriers in the transistor constitutes the emitter current iE, base current iB and collector current iC. Hence deduce the relation iE= iB + iC
Answer
1
Akshit Chaturvedi
Subject: Physics
, asked on 14/2/18
How is the current amplification factor determined using input and output characteristics of CE transistor amplifier?
Answer
1
Ayushi Aggarwal
Subject: Physics
, asked on 14/2/18
State two reasons why a common emitter amplifier is preferred to a common base amplifier ?
Answer
1
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What are you looking for?
Q. Two semiconductor pieces X and Y of same length and equal area or cross-section are provided.
One of the materials is pure semiconductor and the other is doped.
(i) How will you identify the impure semiconductor from the two given pieces X and Y?
(ii) For a given rise in temperature what will be the relative charge in the behaviour of the two materials?
Q.16. The output of a 2 input NOR gate is fed as both inputs A and B to another NOR gate. Draw the logic circuit. Write the truth table for the final output for all possible combination of A, B. Identify the overall gate obtained.
Q.30. (i) In the following diagram, is the junction diode forward biased or reverse biased?