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Important Questions for "Electronics":

[1]

  1. What is phase reversal in electronics?
  2. How is the beta cutoff frequency related to alpha cutoff frequency in transistors?
  3. What are the applications of UJT?

[2]

  1. What is the basic function of a decoder? Explain basic 3-input decoder with diagram.
  2. What do you understand by Virtual Memory? Explain the basic organization and working methodology of Virtual Memory.
  3. Using the postulates of Boolean Algebra, simplify the given expressions.

[3]

  1. Show that NAND gate is a universal gate.
  2. What is the basic function of a decoder? Explain basic 3-input decoder with diagram.
  3. What are 'don't care' conditions? Discuss how they are handled, with the help of an example.

[4]

  1. Show that NAND gate is a universal gate.
  2. Explain the working of a decoder or a multiplexer.
  3. What is cache memory? Explain how it improves the throughput of a digital computer. What is 'Hit Ratio' with respect to cache memory? How many types of cache memories are available? Compare their relative merits and demerits.

[5]

  1. What are the basic gates? How can other gates be constructed using the basic gates? Explain.
  2. Explain serial transfer with respect to a shift register with a suitable example.
  3. Differentiate between Multiplexer and Decoder.

[6]

  1. Explain 'don't care' state in K-Map with an example.
  2. What is 'Race around' condition? Draw the schematic diagram of J-K Master Slave Flip Flop and explain its working as a solution to Race-Around condition.
  3. Draw the Block diagram for a 3-Bit Binary Counter and explain its working with timing diagram.

[7]

  1. What is the role of a Memory Management Unit (MMU) in address translation?
  2. What is the working set model for page replacement based on?
  3. What happens to the state of the interrupted process when a page fault occurs?

[8]

  1. What is the necessity of having a filter in a power supply?
  2. What is a tunnel diode? Draw its characteristic curve and explain its working with the help of an energy band diagram. Mention the application of tunnel diode.
  3. Explain the construction and working principle of a Unijunction Transistor (UJT) with its V-I characteristic curve.

[9]

  1. Explain propagation constant of a uniform transmission line per unit length.
  2. Calculate sampling rate for audio signals with bandwidth of 15 kHz.
  3. Discuss the significance of C programming loops (for, while, do-while).

[10]

  1. Explain DC and AC load lines for transistor.
  2. Convert decimal (4097)10 to binary equivalent.
  3. Draw the circuit of R-C coupled CE amplifier and explain its frequency response curve at different frequency ranges. Why does the gain decrease in low and high frequency ranges?

[11]

  1. Write a short note on emitter follower circuit.
  2. What is Field Effect Transistor (FET)? Why is it called unipolar transistor?
  3. Explain the formation of barrier field across the p-n junction diode. Derive the equation for the width of depletion layer and height of potential barrier.

[12]

  1. Explain the depletion layer in p-n junction diode with suitable diagram.
  2. Discuss the Fermi level in intrinsic and extrinsic semiconductors.
  3. Explain the Kronig-Penny model. Derive the equation for the energy of an electron in one-dimensional periodic potential.

[13]

  1. Find the AND, OR, NOT, EX-OR, and EX-NOR operations for two digital signals.
  2. Discuss Half subtractor and define Boolean functions for outputs.
  3. Simplify the Boolean function for the given logic circuit output.

[14]

  1. Design a Mod 7 binary counter and draw its state diagram and circuit.
  2. Express the given Boolean functions as a sum of minterms and as a product of maxterms.
  3. Design basic gates using NOR gate.

[15]

  1. Differentiate between static RAM and dynamic RAM.
  2. Explain the working of a ring counter.
  3. Explain full-adder with truth table and construct its logic diagram using half-adder.

[16]

  1. State and prove De-Morgan's theorem and simplify the given expression.
  2. What is a flip-flop? Explain the working of RS flip-flop with a logic diagram.
  3. What is a counter? Explain and design a counter with a repeated sequence of six states using JK flip-flops.

[17]

  1. Express the given Boolean function in a sum of minterms.
  2. What is a decoder? Design a BCD to decimal decoder.
  3. Implement the given function using a multiplexer.

[18]

  1. Discuss charging and discharging phenomenon in RC circuit with example.
  2. The power factor of an RL circuit is 1/2. If the frequency of AC is doubled, what will be the power factor?
  3. State and prove Norton's theorem. Write down its advantage in network analysis.

[19]

  1. In the state of resonance, the frequency of an LC circuit is given by f = 1 / (2LC).
  2. A capacitor is generally a linear and bilateral component.
  3. Which of the following is a passive element?

[20]

  1. What is the base of the hexadecimal number system?
  2. Which register is used to convert temporal code into a special code?
  3. How many NAND gates are required to implement the Boolean function Y(A,B,C) = m(0,1,3,5) using NAND-NAND logic?

[21]

  1. In an amplifier, a coupling capacitor prevents DC mixing with the output.
  2. A JFET's pinch-off voltage is given by V_P.
  3. A certain D-MOSFET biased at V_GS=0V has a specified I_DSS=20mA and V_P=-5V. What is the value of drain current?

[22]

  1. Explain the difference between cache memory and virtual memory.
  2. State and verify De Morgan's Law in Boolean Algebra.
  3. Define Multiplexer (81) MUX Design.

[23]

  1. What is race-around condition? Construct a master-slave flip-flop using an SR flip-flop.
  2. What is track and sector? How is data stored in a hard disk, floppy disk, and CD-ROM? Explain.
  3. Simplify the given Boolean functions using appropriate methods.

[24]

  1. Derive the Boolean expression for the given logic circuit.
  2. Design 5-Mod counters using J-K flip-flop.
  3. Describe the following memory types: ROM, PROM, EPROM, RAM, Virtual Memory.

[25]

  1. Explain the working of half-adder with suitable block diagram.
  2. Draw the logic diagram of a Master slave D flip-flop using NAND gates.
  3. What do you know about K-map?

[26]

  1. Differentiate between flip flop and latches.
  2. What do you mean by shift register? What is the need of shift register?
  3. List the examples of primary memory and secondary memory.

[27]

  1. Construct a half adder circuit using basic gates.
  2. Explain cache memory and cache initialization. Discuss the significance of cache memory.
  3. Design a 328 RAM chip using 164 memory chips.

[28]

  1. A transistor has an Ic of 100 mA and IB of 0.5 mA. What is the value of adc?
  2. Describe the Ebers-Moll model of a bipolar junction transistor and explain the working of the transistor.
  3. Drive an expression for Adder-Subtractor circuit using OP-AMP.

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