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JEE Main 202131 AugustEvening Shift
Exam
JEE Main
Year
2021
Date
31 August
Shift
Evening Shift
Subject
Physics
Chapter
Semiconductors

JEE Main 2021 · 31 August · Evening Shift · Physics · Semiconductors

If V _ A and V _ B are the input voltages (either 5V or 0V ) and V...

If VAandVB{V}_{A} and {V}_{B} are the input voltages (either 5Vor0V5V or 0V)andV0istheoutputvoltagethenthetwogatesrepresentedinthefollowingcircuits(A)and(B)are:<br/><imgsrc="https://cdn−question−pool.getmarks.app/pyq/jeemain/980f5d53−99af−4390−8533−f958bc16d3db−image.png"style="width:680px;height:325px;"/>and {V}_{0} is the output voltage then the two gates represented in the following circuits \left(A\right) and \left(B\right) are :<br /><img src="https://cdn-question-pool.Quantrex.app/pyq/jee_main/980f5d53-99af-4390-8533-f958bc16d3db-image.png" style="width: 680px; height: 325px;" />

Options

  1. AOR and NOT Gate
  2. BAND and NOT Gate
  3. CAND and OR Gate
  4. DNAND and NOR Gate

Correct answer

A. OR and NOT Gate

Step-by-step solution

If V _ A and V _ B are the input voltages (either 5V or 0V ) and V _ 0 is the output voltage then the two gates
In the above circuit is we are applying high voltage in any one of the diodes or in both diodes simultaneously then we get a high out due to forward biasing of diode while we are applied low voltage in both the diode then we get low voltage so this is like OR gate.

If V _ A and V _ B are the input voltages (either 5V or 0V ) and V _ 0 is the output voltage then the two gates

In the above circuit which is an NPN transistor in a common emitter configuration having a phase difference of 180°180 ° between input voltage and output voltage, when we are applied high voltage then we get low voltage vice-versa so, the circuit is the same as NOT gate.

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