Electrical & Electronics Engineering – May 2010

Part – A

    1. Define charge, current, potential and potential difference.
    2. Which of the following are made by ohms law ?
      1. V = IR
      2. I = VR
      3. R = VI
      4. V = I/R
    3. The unit for power ______.
    4. What is current drain cells ?
    5. A Magnetic Shielding is provided because ______.
    6. Draw the truth table for AND, OR gates.
    7. Draw the schematic diagram of JK Flip-Flop.
    8. What is a P-N Junction diode ? Draw the diagram.
    9. Moving coil meter is used to measure :
      1. ac current
      2. dc current
      3. ac voltage
      4. dc voltage
    10. The unit of capacitance :
      1. μf
      2. ohm
      3. μH
      4. μH
      5. H
    11. Rating of a transformer is ______.
      1. kV
      2. kVA
      3. kW
      4. kA
    12. BJT stands for Bipolar ______ Transistor.
    13. Draw the truth table of NAND gate.
    14. Define Modulation.
    15. Draw the diagram of half-wave rectifier.
    16. Define magnetic flux.

Part – B

Unit -I

    1. What is the essential difference between direct current and alternating current ?
    2. Derive the formula for electric power.
    3. Find the amount of charge that can be separated by 1.5 V battery, if the energy produced by chemical reaction is 7.5 J.
    1. A certain relay has a resistance of 750 Ω and requires a current of 32 mA in order to energize. How much power does the relay coil consume ?
    2. Determine the power rating of a microwave oven; if it has a resistance of 36 Ω the oven is attached to a 230 V power line.

Unit -II

    1. State and explain kirchoff’s law.
    2. The series circuit given below has unknown resistance find that ? And find the total resistance in the circuit.
      Electrical & Electronics Engineering - May 2010 - Q4-b
  1. Explain the principle and operation of a moving coil ammeter with a neat sketch.

Unit -III

    1. What is the difference between r.m.s. and the average values of a sinusoidal voltage ?
    2. Define the terms :
      1. Cycle
      2. Time period
      3. Frequency
      4. Phase difference
  1. Describe in detail the Functioning of Lead-Acid Cell.

Unit -IV

    1. What are the features of electrolytic capacitors ?
    2. Derive an expression for equivalent capacitances if they are connected in:
      1. Series
      2. Parallel
    1. What are the different types of magnets ?
    2. Explain the working of a transformer.

Unit -V

    1. Draw and explain the working of FET.
    2. What is the difference between BJT and FET ?
    1. Using NAND gate realise ( x + y ) . ( z + y )
    2. Explain the working of half-wave rectifier.

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.