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RRB/SSC JE Electrical 2019 || Transformers Quiz 2
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Question 1
A single phase transformer has 400 primary and 1000 secondary turns. The net cross-sectional area of the core is 
If the primary is connected to 
source, the peak value of flux density in the core is
If the primary is connected to source, the peak value of flux density in the core is Question 2
A 10Ω resistive load is to be impedance matched by a transformer to a source with 6250Ω of internal resistance. The ratio of primary to secondary turns of transformer should be:
Question 3
A 
transformer takes no-load current of 
and absorbs 187 W. If the resistance of the primary is 
what is no-load power factor?
transformer takes no-load current of and absorbs 187 W. If the resistance of the primary is what is no-load power factor? Question 4
How are transformers generally cooled for installations rated at less than 5 kVA?
Question 5
In a 
transformer, the iron loss is 
and full-load Cu loss in 
The efficiency of the transformer at full-load at 0.8 p.f. lagging is
transformer, the iron loss is and full-load Cu loss in The efficiency of the transformer at full-load at 0.8 p.f. lagging is - 1099 attempts
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Jul 29ESE & GATE EE
