Test: Electronics - 1 - Physics MCQ

# Test: Electronics - 1 - Physics MCQ

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## 20 Questions MCQ Test GATE Physics Mock Test Series 2025 - Test: Electronics - 1

Test: Electronics - 1 for Physics 2024 is part of GATE Physics Mock Test Series 2025 preparation. The Test: Electronics - 1 questions and answers have been prepared according to the Physics exam syllabus.The Test: Electronics - 1 MCQs are made for Physics 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electronics - 1 below.
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Test: Electronics - 1 - Question 1

### A MUX network is shown below. The funciton Z1 is

Detailed Solution for Test: Electronics - 1 - Question 1

Test: Electronics - 1 - Question 2

### A Silicon PN junction diode under reverse bias lias depletion region of widlit 10 μm. The relative peunittivity of Silicon. εr =11.7 and the permittivity of free space ε0 = 8.85 x 10-12 F/m . The depletion capacitance of the diode per square meter is

Detailed Solution for Test: Electronics - 1 - Question 2

C= depletion capacitance ;
Depletion capacitance/ m2

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Test: Electronics - 1 - Question 3

### For the transistor shown below. β = 30 and VCEQ = 6 V. The value ofV1 is

Detailed Solution for Test: Electronics - 1 - Question 3

Given β = 30, VCE = 6 V " quiscent point", V1 = ?

We know VBE = 0.7 V, “Si” BJT

K C L at point “A ”
Put value of IB, V1 = 3.955

Test: Electronics - 1 - Question 4

For the square wave generator shown below the frequency is

Detailed Solution for Test: Electronics - 1 - Question 4

Square wave generator frequency is equal to

Test: Electronics - 1 - Question 5

Detailed Solution for Test: Electronics - 1 - Question 5

Led will glow when it is in forward bias, it means output of NAND gate is "O’, since p-terminal of led is applied to +5V. Output of NAND gate is always "1” irrespective of the switch position.

Test: Electronics - 1 - Question 6

Detailed Solution for Test: Electronics - 1 - Question 6

Frequency of output Q = ?

Test: Electronics - 1 - Question 7

The truth table for an S-R flip-flop has how many VALID entries?

Detailed Solution for Test: Electronics - 1 - Question 7

The SR flip-flop actually has three inputs, Set, Reset and its current state. The Invalid or Undefined State occurs at both S and R being at 1

Test: Electronics - 1 - Question 8

The three-stage Johnson counter as shown in figure below is clocked at a constant frequency of fc from the starting state of Q2Q1Q0 =101. The frequecny of output Q2Q1Q0 will be

Detailed Solution for Test: Electronics - 1 - Question 8

3-stage Johnson-counter ⇒ but not D-flip flop, so find complete output Q2 Q1 Q0 = 1 0 1

Test: Electronics - 1 - Question 9

A 4-bit light shift register is initialized to value 1000 for (Q3, Q2, Q1, Q0 ). The D input is derived from Q0, Q2 and Q3 through two XOR gates as shown in figure. The pattern 1000 will appear at

Detailed Solution for Test: Electronics - 1 - Question 9

Hence after clock pulse. Sequence

Q Q2 Q1 Q= 1000 is repeated.

Test: Electronics - 1 - Question 10

The network shown below implements

Detailed Solution for Test: Electronics - 1 - Question 10

Frequency is equal to

Test: Electronics - 1 - Question 11

In the circuit shown beolw diodes has cutin voltage of 0.6 V. The dioide in ON state are

Detailed Solution for Test: Electronics - 1 - Question 11

...(a)
.....(b)
Find I1 and I2. if I1 and I2 are positive finite then both the diode are ON. Check: D2-diode-ON

Test: Electronics - 1 - Question 12

The following circuit is an example of

Detailed Solution for Test: Electronics - 1 - Question 12

Inverting-Amplifier is an example of voltage shunt feedback

Test: Electronics - 1 - Question 13

For the circuit shown below the input voltage vi is as shown in figure.

Assume the RC time constant large and cutin voltage of diode Vγ = 0. The output voltage vo is

Detailed Solution for Test: Electronics - 1 - Question 13

Test: Electronics - 1 - Question 14

The value of C required for sinusoidal oscillation of frequency 1 kHz in the following circuit is

Detailed Solution for Test: Electronics - 1 - Question 14

CKT is standard wein bridge osicllator

Test: Electronics - 1 - Question 15

Consider an op-amp circuit shown in figure, input to the circuit is shown in figure, Initially voltage across capacitor is zero,

the output waveform will be

Detailed Solution for Test: Electronics - 1 - Question 15

Given circuit is an LPF-circuit behaves as integrators

Integration of square wave is triangular wave (starting with negative slope)

Test: Electronics - 1 - Question 16

Circuit shown below is a

Detailed Solution for Test: Electronics - 1 - Question 16

⇒ Low frequency capacitor open,  is finite
⇒ High frequency capacitor short,
So, its 0 - LPF

Test: Electronics - 1 - Question 17

Ill the circuit of figure the voltage Vx is

Detailed Solution for Test: Electronics - 1 - Question 17

Vx = ?

*Answer can only contain numeric values
Test: Electronics - 1 - Question 18

Minimum number of two input NAND gate to design function f = ...........

Detailed Solution for Test: Electronics - 1 - Question 18

Design this function using basic gate first

We Know,

⇒ Add-inverter at output of AND-gate

Therefore. 5 NAND-gate needed.

*Answer can only contain numeric values
Test: Electronics - 1 - Question 19

The full scale output of a 10-bit DAC is 5 V. The resolution is_____________mV

Detailed Solution for Test: Electronics - 1 - Question 19

Test: Electronics - 1 - Question 20

If VA-VB = 6V. then VC - VD is

Detailed Solution for Test: Electronics - 1 - Question 20

Given: VA-VB= 6V and RAB = 2Ω
∴
Current enter into the port = Current out from port.
∴ IDC = 3 A

Applying nodal analysis at P.
-2 A - 3A +1 = 0
I = 5A

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