Basic Electronics — Summer 2023

Objective Question (MCQ) 1. Ohm’s law (V = IR)

Can be applied to a.c similar to that of d.c.

Can be applied to a.c. but after replacing Rby Z (impedance)

Can never be applied to a.c

None of the above 2. If 10 mA current flows through a 5 KΩ resistance then the power dissipation in it would be_______

5 mW (b) 50 mW (c) 500 mW (d) None 3. Unit of capacitance is __________.

Ampere (b) Volt (c) Henry (d) Faraday 4. While applying super position theorem, _______ is replaced by open circuit.

current source (b) voltage source (c) resistance (d) all of these 5. The Digital Circuit which accepts many input and produces only one output is known as

Encoder (d) Demultiplexer (c) Multiplexer (d) Decoder 6. Acontrol system in which the control action is somehow dependent on the output is known as

closed loop System (b) semi closed loop system

open system (d) None of the 7. The equivalent Decimal of the BCD (001110001001)BCD is________.

(388) , (b) (386) , (c) (380) , (d) (389) 8. X(t)= - X(t) is the property of

Even signal (b) Odd signal

Periodic signal (d) Aperiodic signal 9. Wireless mobile cells are _______________ in shape

pentagon (b) hexagon (c) circular (d) square 10. PAM stands for

Pulse And Modulation (b) Pulse Analog Modulation

Pulse Altitude Modulation (d) Pulse Amplitude Modulation 11. Which are the logic gates kwon as a Universal Gates?

XOR, AND, (b) AND, OR,

NAND, NOR, (d) XNOR,OR 12. Out of following signals __________ is an even signal.

Cosine wave (b) Sine wave

Triangle wave (d) None of the above. 13. Minimum bandwidth of an AM wave is ________.

fm (b) 2fm (c) 0.5fm (d) 4fm 14. Acontrol system with feedback has

maximum error (b) minimum error

zero error (d) infinite error

Explain Kirchhoff’s Voltage law.

Write a short note on Ammeter and Voltmeter.

Explain WYE-DELTA and DELTA-WYE transformation using necessary equations and circuit diagrams.

Draw circuit diagram of Inverting operational amplifier & explain in brief.

List out ideal characteristics of ideal Op-Amp.

Explain the working of a Low pass filter using an Op-Amp.

Reduce the given Boolean expression using K-map. F(A,B,C) = ∑m(0,2,3,5)

State and Prove De Morgan’s laws.

Find out current through 10 04 resistor.

Define Waveguide, Transmission lines and Antenna.

What is modulation? Why modulation is required?

Draw the block diagram of a Communication system. Explain each block.

Compare Microprocessor and Microcontroller.

Classify network topologies and draw each one of them.

Draw and explain ISO-7 layer model block diagram of an OSI for computer Networks.

Compare Open Loop and Closed Loop Systems.

Define a control system. Classify them and state their advantages.

Explain any seven rules of Block diagram reduction for control system with necessary block diagrams.