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RRB/SSC JE Electrical 2019 || Previous Year Questions
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Question 1
A 230/2300 V transformer takes no-load current of 5 A, at 0.25 power factor lagging. The core loss is
Question 2
A 
transformer takes no-load current of 
and absorbs 187 W. If the resistance of the primary is 
what is the active component of current?
Question 3
The relation between primary ampere-turns and secondary ampere-turns in Fig. is……………………
Question 4
Referring to the approximate equivalent circuit of an actual transformer on load in Fig., the secondary resistance 
when transferred to primary becomes………
when transferred to primary becomes……… Question 5
In the short-circuit test on a transformer, we generally short-circuit…………….
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Mar 19ESE & GATE EE
