Physics
GATE PH topic:electronics PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 40. Imported answers require independent review unless marked reviewed.
Question 5
Open questionPHMCQ1 markNeeds review
Which one of the following is a universal logic gate?
Your answerChoose one option.
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Which one of the following is the correct binary equivalent of the hexadecimal F6C?
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Open questionPHMCQ2 marksNeeds review
The input voltage (V
) to the circuit shown in the figure is
V. The output voltage (V
) is
V. If R = 1 k
, the value of C (in
F) is 
Your answerChoose one option.
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Open questionPHMCQ2 marksNeeds review
Consider a 4-bit counter constructed out of four flip-flops. It is formed by connecting the J and K inputs to logic high and feeding the Q output to the clock input of the following flip-flop (see the figure). The input signal to the counter is a series of square pulses and the change of state is triggered by the falling edge. At time
the outputs are in logic low state (
). Then at
, the logic state of the outputs is 
Your answerChoose one option.
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Open questionPHNAT2 marksNeeds review
Consider the circuit given in the figure. Let the forward voltage drop across each diode be 0.7 V. The current I (in mA) through the resistor is _____.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 3
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For the following circuit, what is the magnitude of
if
? 
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Open questionPHMCQ2 marksNeeds review
Consider the following Boolean expression:
It can be represented by a single three-input logic gate. Identify the gate.Your answerChoose one option.
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Open questionPHMCQ2 marksNeeds review
A 3-bit analog-to-digital converter is designed to digitize analog signals ranging from 0 V to 10 V. For this converter, the binary output corresponding to an input of 6 V is
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Open questionPHMCQ2 marksNeeds review
For the following circuit, the correct logic values for the entries
and
in the truth table areG | A | B | P | C | X | Y |
|---|---|---|---|---|---|---|
1 | 0 | 1 | 0 | 0 | 0 | 1 |
0 | 0 | 0 | 1 | 0 | | |
1 | 0 | 0 | 0 | 1 | 0 | 1 |
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Open questionPHNAT2 marksNeeds review
For a given load resistance
, the power transfer efficiencies
of a dc voltage source and a dc current source with internal resistances
and
, respectively, are equal. The product
in units of
(rounded off to one decimal place) isLog in to check the answer
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