Electrical & Electronics Engineering – May 2014

Part – A

    1. Give the difference between electric and magnetic fields.
    2. State Kirchoff’s voltage law.
    3. Name any three insulators.
    4. An alternating current varies through one complete cycle in 1/1000 seconds. Calculate period and frequency.
    5. Define wavelength.
    6. The types of connections available for three-phase power are ______ and ______.
    7. The energy stored in a capacitor is ______.
    8. Define efficiency of a transformer.
    9. Write the truth table for two input OR gate.
    10. Define modulation and draw the symbol of NPN transistor.

Part – B

Unit -I

    1. Define each of the following giving its unit, weight and symbol:
      1. charge
      2. potential difference
      3. current
      4. resistance
      5. conductance
    2. Give three differences between voltage and current.
    3. Calculate the power in a circuit. Where the source of 100V produces 2A in a 50Ω resistor.
    1. Give the colour code for the following resistors using five band code.
      1. 3320 Ω + 0.1%
      2. 7.23k Ω ± 0.1%
      3. 333k Ω ± 2%
      4. 47.5 Ω + 0.25%
      5. 680k Ω ± 5%
    2. Define :
      1. Electromagnetism
      2. Ohm’s law
    3. State any three precautions to follow when working on electric circuit.

Unit -II

  1. Explain the principle and operation of a moving coil ammeter with neat sketch.
  2. State Kirchoff’s current law and Kirchoffs voltage law with neat diagram derive the necessary equations for KVL and KCL.

Unit -III

    1. List the types of chemical cells, giving two features each,
    2. With neat sketch explain the construction of a carbon-Zinc dry well with negative and positive electrodes and the electrotype.
    1. The length of TV antenna is λ/2 for radio waves with f of 60 MHz. What is the length in centimetres and feet?
    2. Define the following parts in the assembly of motors:
      1. Armature rotor
      2. field stator
      3. collector rings
      4. Commutator segments

Unit -IV

    1. Explain briefly how to charge a capacitor and how is charged capacitor discharged.
    2. A 30Ω R is in series with 40Ω of XC . Calculate ZT and θZ.
    1. List any five differences of capacitance and inductance.
    2. Define the following terms :
      1. coefficient of coupling
      2. Transformer efficiency
      3. stray inductance
      4. Eddy current loss
      5. stray capacitance

Unit -V

    1. Draw the truth table for three input OR gate and AND gate.
    2. Explain what is meant by toggle mode of JK flip-flop.
  1. Draw and explain the working of FET.

Attention : This exam questions are converted from the real exam paper to a digital text format by using an OCR Software that may made some mistakes, I reviewed it many times to correct it, But may still there some errors that I missed or misspelled, So if you detect an error or mistake PLEASE report by adding a comment or contact me.