Electrical Engineering Tutorials

BASIC CONCEPT OF INITIAL CONDITION IN NETWORK ANALYSIS

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Multiple Choice Question/ Objective question Electrical Material Part -4 for Competition Exam Q.1. Superconductors are becoming popular for use in (a) Generating very strong magnetic field (b) Manufacture of bubble ...

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Multiple Choice Question/ Objective question Electrical Material Part -1 for Competition Exam Q.1 Materials which can store electrical energy are called (a) Magnetic materials (b) Semi conductors (c) Dielectri...

All day efficiency transformer numerical problem
EFFICIENCY
A transformer has maximum efficiency of 98% at 15 KVA at unit p.f.. It is loaded as follows
(i) 12 Hrs - 2KW at p.f. 0.5,
(ii) 6 Hrs - 12 KW at p.f. 0.8
(iii) 6 Hrs - 18 KW at p.f. 0.9 . Calculate All day Efficiency of Transformer.
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