Answer Posted / elango.k

In dc the rate of change of flux is zero .when dc is
applied to primary windings there is no back emf to oppose
the supply voltage . the winding acts as resistance -where
high current flow through the coil and transformer is burnt.

I=V-Eb/R

Eb-BACK EMF
V- DC SUPPLY
I- CURRENT IN PRIMARY
R- RESISTANCE OF COIL(small)

how much cable size required for 70 kilowatt load.

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how flow current in 220 kv line to line

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george phenomenon of synchronous machine

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Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph

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