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01000EE100092001

A coil consists of 600 turns and current 10 A in the coil gives rise to a magnetic
flux of 17979. Calculate (1) self-inductance (11) induced emf (iii) energy stored
when the current is reversed in 0.01 second.

State Faradays Laws of electromagnetic induction.

List the similarities and differences between electric and magnetic circuits.

A circular iron ring wound with 100 turns of coil develop a magnetic flux of 10
mWb when coil carries a current of 1 A. Find the mmf of the source and
reluctance of the ring?

Derive the value of the form factor of sinusoidal AC.

A series circuit has R=10Q, L=50mH and C=100uF and is supplied with 200V,
50Hz. Find impedance, current and power factor.

In a2 wattmeter method power measured was 30kW at 0.7 pf lagging. Find the
reading of each wattmeter.

Explain the function of any five substation equipment.

Draw the schematic of a hydroelectric power plant explain the working.
Mention two advantages and disadvantages of solar power generation.

MODULE 5
Answer any one full question
Compare the characteristics and applications of DC Shunt and DC Series

motors.
A 230۷ DC series motor is taking 50 A. Resistance of armature and series field
winding are 0.2Q and 0.1Q respectively. Calculate the back emf.

OR
Explain the working principle ofa single phase transformer?
A single phase transformer, rated at 100kVA, is working at full load and 0.8
power factor. If the copper loss and core loss are found 1400W and 940W
respectively, calculate the efficiency of the transformer.

MODULE 6
Answer any one full question
Explain the working of a three phase induction motor.
Calculate the synchronous speed and 905110 of a 3 phase 50 Hz 4 pole induction

motor running at 1400 rpm.

OR
A single phase induction motor is not sel f-starting. Why?
Explain the working ofa split phase induction motor with necessary sketches.
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