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Important Questions for "Electronics":

[1]

  1. What is phase reversal in electronics?
  2. What are the applications of UJT?
  3. How is collector efficiency calculated for class A amplifiers?

[2]

  1. What is the basic function of a decoder? Explain basic 3-input decoder with diagram.
  2. What are 'don't care' conditions? Discuss how they are handled, with the help of an example.
  3. Using the postulates of Boolean Algebra, simplify the given expressions.

[3]

  1. Using the Karnaugh Map method, minimize the given expression.
  2. Describe the working of a Ripple counter with suitable diagram and counting sequence. How is the Ripple counter used in digital circuits?
  3. What is a Shift Register? Discuss the different modes of operation of Shift Register with clear diagram. Mention the use of Shift Register in computer hardware circuits.

[4]

  1. Which gate is known as the 'Agreement Gate'? Why?
  2. Write short notes on: (i) RAM Banking, (ii) Associative Memory.
  3. Differentiate between: (i) Edge Triggered and Pulse Triggered Flip Flop, (ii) Binary Code and BCD Code, (iii) SIPO and PISO Shift Register.

[5]

  1. Explain the following terms: De Morgan's Law, ROM and RAM, Counters.
  2. Design a 5-Mod Counter using JK flip-flops and implement it.
  3. Write short notes on any three of the following: EPROM, State table, Master-Slave Flip-Flop, Implementation of F(a, b, c) = (0, 6) using NAND and NOR gates.

[6]

  1. Write the expression and draw the truth table with basic gate diagrams for NOR gate, NAND gate, XOR gate, and XNOR gate. Which of these is a universal gate and why?
  2. Draw the truth table for the expression y = BC + ABC and construct the POS expression for y.
  3. 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.

[7]

  1. What is the process that divides the disk into sectors and tracks?
  2. What are the techniques that move program blocks to or from physical memory?
  3. What are the two canonical forms of Boolean expressions?

[8]

  1. Explain the effect of temperature on the reverse saturation current in a junction diode.
  2. Why is biasing necessary for a transistor? Describe various methods of transistor biasing. Which method is best and why?
  3. Write notes on distortion in amplifiers.

[9]

  1. Discuss input impedance of short-circuited transmission line.
  2. List main causes of energy losses in optical fibers.
  3. What is Gaussian elimination and its use in solving linear equations?

[10]

  1. Convert octal number (24) to binary equivalent.
  2. Explain the working of tuned collector oscillator with circuit diagram and derive the equation for its frequency of oscillation.
  3. Simplify the given expressions using Boolean Algebra method.

[11]

  1. Calculate the barrier capacitance of p-n junction diode made of Germanium having area 1 um and thickness 100 nm. The dielectric constant of Germanium is 16.
  2. What are Power Amplifiers? Write down the difference between Voltage and Power Amplifiers. Explain the working of class A power amplifier with suitable circuit diagram and output characteristic curve.
  3. What is MOSFET? Explain the construction and working of depletion type and enhancement type of MOSFET with their respective characteristic curves.

[12]

  1. Derive the Barkhausen criterion for sustained oscillations.
  2. 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.
  3. What are Power Amplifiers? Write down the difference between Voltage and Power Amplifiers. Explain the working of class A power amplifier with suitable circuit diagram and output characteristic curve.

[13]

  1. Draw the logic diagram for BCD to Excess-3 code converter. Include truth table and K-map steps.
  2. Find the AND, OR, NOT, EX-OR, and EX-NOR operations for two digital signals.
  3. Construct a 5 x 32 decoder using 3 x 8 decoders and 2 x 4 decoder.

[14]

  1. State the principle of duality in Boolean algebra and give the dual of the Boolean expression.
  2. Implement EX-OR gate with the help of NAND gate and show the output at each step.
  3. Define Full Adder and implement a full adder circuit using NAND gate.

[15]

  1. Differentiate between SOP and POS methods with their maxterms and minterms.
  2. Explain the working of RS flip-flop using logic diagram and excitation table.
  3. Explain the working of ROM and design a 32x8 ROM structure.

[16]

  1. State the absorption law of Boolean Algebra.
  2. State and prove De-Morgan's theorem and simplify the given expression.
  3. Find the minterms of the provided logical expression.

[17]

  1. Simplify the given expression for a function using Boolean algebra.
  2. Explain multiplexers and demultiplexers and design an 8 x 1 multiplexer using two 4 x 1 multiplexers.
  3. Write short notes on the block diagrams of RAM and ROM, cache memory, virtual memory, and the difference between static RAM and dynamic RAM.

[18]

  1. Explain working of High pass filter.
  2. Explain Lenz's law of electromagnetic induction.
  3. Find out the current flowing through 40 resistance in the given circuit.

[19]

  1. A non-inverting closed-loop op-amp circuit generally has a gain factor greater than one.
  2. When Xc = XL in an LCR circuit, the circuit is at resonance.
  3. The power factor of the arc in circuit breakers is always lagging.

[20]

  1. The hexadecimal number 16 is equivalent to which binary number?
  2. Convert the Gray code 101100 to binary.
  3. Subtract 11101 - 1100 using 2's complement.

[21]

  1. A power supply with 0% voltage regulation is a regulated power supply.
  2. The load regulation of IC 723 is 0.03%.
  3. In CMOS logic circuits, the n-MOS transistor acts as a pull-down network.

[22]

  1. How many address lines does the 2732 EPROM have?
  2. Explain how a J-K flip-flop can be converted into a D flip-flop.
  3. Define Multiplexer (81) MUX Design.

[23]

  1. What are universal gates? Explain how basic gates can be realized using NAND and NOR gate.
  2. Design and draw the logic diagram of a full adder.
  3. Explain how the 3-to-8 decoder function can be obtained from a demultiplexer.

[24]

  1. Give the applications of shift registers.
  2. Give the difference between SRAM and DRAM.
  3. Discuss various types of Logic Gates and their applications.

[25]

  1. Explain the working of half-adder with suitable block diagram.
  2. Design the binary counters having the repeated binary sequence: (i) 0, 1, 2 (ii) 0, 1, 2, 3, 4 using JK flip-flops.
  3. Implement a full adder with the help of two half adders and an OR gate.

[26]

  1. Draw & explain bidirectional shift register.
  2. Draw and explain 4-bit binary synchronous counter.
  3. Differentiate between primary memory and secondary memory.

[27]

  1. State and prove De-Morgan's theorem.
  2. Explain cache memory and cache initialization. Discuss the significance of cache memory.
  3. Formulate all pertinent information required to construct a two-way set associative cache memory and determine its size.

[28]

  1. Explain the Drift current and Mobility.
  2. What is the Ripple factor of Rectifier? Find the Ripple factor of half-wave rectifier.
  3. Explain in brief, the construction and operation of MOSFET.

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