Electrical & Electronics Engineering – December 2014

Part – A

    1. Define Ohm’s law.
    2. What is the color coding of a resistor?
    3. According to Kirchoffs voltage law, the algebraic sum of all – I.R. drops and e.m.fs. in a closed path is:
      1. Positive
      2. Negative
      3. Zero
      4. None of the above.
    4. A fuse wire is made up of:
      1. Tungsten
      2. Tin coated zinc
      3. Nickel
      4. All of the above.
    5. What are the important specifications of a resister?
    6. What are the different types of capacitors available?
    7. Thirty zinc-carbon dry cells each of 1.5 V are connected in series the total o/p voltage is ______
    8. What is the difference between ideal current source and practical current source?
    9. Draw the truth table of AND or Gate,
    10. Draw the schematic of JK-flip-flop.

Part – B

Unit -I

    1. State and explain Kirchoffs current law and voltage.
    2. Explain the concept of open circuit and closed circuit.
    1. Electrical & Electronics Engineering – December 2014 - Q3-a
      Using Kirchoffs and Ohms law find the value of resistor R in the above
    2. Three resistances are connected in:
      1. Series
      2. Parallel – obtain their equivalent resistances.

Unit -II

  1. Obtain the current flowing through all the resistances and voltage drops across 2Ω, 4Ω and 6Ω resistor in the circuit shown below:

    Electrical & Electronics Engineering – December 2014 - Q4
  2. Explain the principle and operation of a moving coil ammeter with a neat sketch.

Unit -III

  1. Describe the functioning of a lead – acid wet cell with a neat sketch.
  2. Three coils each having a resistance of 30Ω and impedance of 50Ω are connected in delta across a 400 V, 50 Hz, 3 phase supply. Find:
    1. The line current
    2. The power factor
    3. The active power absorbed.

Unit -IV

  1. Two capacitors of 6μF and 9μF are connected in parallel, A 10μF capacitor is connected in series with this parallel combination. When the voltage applied is 100 V dc compare:
    1. The total capacitance of the Ckt.
    2. The voltage across each capacitor
    3. The total charge in the circuit.

Unit -V

  1. Draw the V-l characteristics of a P-h junction diode and explain the working when it is connected in:
    1. forward bias and
    2. reverse bias.
  2. Explain the diagram, of N-channel FET and its volt-ampere characteristics and how it is different from bipolar junction transistor.

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.