Part – A

 Give the difference between electric and magnetic fields.
 State Kirchoff’s voltage law.
 Name any three insulators.
 An alternating current varies through one complete cycle in 1/1000 seconds. Calculate period and frequency.
 Define wavelength.
 The types of connections available for threephase power are ______ and ______.
 The energy stored in a capacitor is ______.
 Define efficiency of a transformer.
 Write the truth table for two input OR gate.
 Define modulation and draw the symbol of NPN transistor.
Part – B
Unit I

 Define each of the following giving its unit, weight and symbol:
 charge
 potential difference
 current
 resistance
 conductance
 Give three differences between voltage and current.
 Calculate the power in a circuit. Where the source of 100V produces 2A in a 50Ω resistor.

 Give the colour code for the following resistors using five band code.
 3320 Ω + 0.1%
 7.23k Ω ± 0.1%
 333k Ω ± 2%
 47.5 Ω + 0.25%
 680k Ω ± 5%
 Define :
 Electromagnetism
 Ohm’s law
 State any three precautions to follow when working on electric circuit.
Unit II
 Explain the principle and operation of a moving coil ammeter with neat sketch.
 State Kirchoff’s current law and Kirchoffs voltage law with neat diagram derive the necessary equations for KVL and KCL.
Unit III

 List the types of chemical cells, giving two features each,
 With neat sketch explain the construction of a carbonZinc dry well with negative and positive electrodes and the electrotype.

 The length of TV antenna is λ/2 for radio waves with f of 60 MHz. What is the length in centimetres and feet?
 Define the following parts in the assembly of motors:
 Armature rotor
 field stator
 collector rings
 Commutator segments
Unit IV

 Explain briefly how to charge a capacitor and how is charged capacitor discharged.
 A 30Ω R is in series with 40Ω of X_{C} . Calculate Z_{T} and θ_{Z}.

 List any five differences of capacitance and inductance.
 Define the following terms :
 coefficient of coupling
 Transformer efficiency
 stray inductance
 Eddy current loss
 stray capacitance
Unit V

 Draw the truth table for three input OR gate and AND gate.
 Explain what is meant by toggle mode of JK flipflop.
 Draw and explain the working of FET.
Attention : This exam questions are converted from
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