Electrical & Electronics Engineering – November 2012

Part – A

    1. State Coulomb’s law and define atomic structure.
    2. What kind of meter is used to measure the potential difference of a battery?
    3. If a voltage of 10 volts produces a current of 2.5 amperes then what is the resistance in the circuit.
    4. Explain the functions of multimeter.
    5. Find the resistance of 1000 W bulb connected across a power line carrying 0.5 Amp of current.
    6. Show how to connect two resistance A and B in series with each other across a voltage source.
    7. Which type of cell can be recharged and give an example of a material with negative temperature coefficient.
    8. Derive the value of total capacitance when two capacitance having values of 2μF and 3μf are connected in series.
    9. Name two semi conductors. Give one application.
    10. What is the characteristic of the charge on the proton and the electron and what is the function of a rectifier.

Part – B

Unit -I

    1. Explain the difference between conventional current direction and electron flow direction.
    2. An electric heater having a resistance of 25 Ohm is connected to 230 V mains supply through a cable having a total resistance of 0.2 Ohm. Calculate the power dissipated by heater power wasted in cable and total energy consumed in 2 hours.
    1. Show the atomic structure of the element sodium (Na) with atomic number 11 What is its electron valance?
    2. State the three forms of Ohm’s law relating V, I and R.
    3. List the differences between a potentiometer and a rheostat.

Unit -II

    1. Explain the construction and operation of a basic moving coil meter.
    2. Draw a circuit with two bulbs, a battery and an SPDT switch that determines which bulb lights.
    1. State and explain Kirchoff’s law.
    2. Distinguish between a conductor and insulator. Give the examples of each and their applications.

Unit -III

    1. Draw a sketch illustrating the construction of a carbon-zinc dry cell.
    2. In the circuit of figure, with S1 in position, 1, V=50 Volts with S1 in position 2, V = 37.5 Volts. Calculate r1 .
      Electrical & Electronics Engineering – November 2012 - Q6-b
    1. Mention different types of cells.
    2. Explain the voltaic coll.

Unit -IV

    1. Explain how charge is stored in the dielectric of a capacitor.
    2. Describe the working of transformer.
    1. Explain the types of capacitors.
    2. How much charge.is stored in a 2μf capacitor connected across a 50 V supply.

Unit -V

    1. Give the applications of a diode.
    2. Explain the PNP and NPN transistor.
  1. Explain the analog and the digital signals with neat diagrams.

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.