Answer Posted / prasanna d nerkar

A transformer can accept energy at one voltage and deliver
it at another voltage. This permits electrical energy to be
generated at relatively low voltages and transmitted at
high voltages and low currents, thus reducing line losses
and voltage drop hence transformers are issential for power
transmition

How to measure power in 2 or 4 or n phase circuit? Please give me a formula.

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A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

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