(1) From the following option, which option is correct for largest size transformer.?
a)1KVA,25Hz , b)1KVA,50HZ , c)1KVA,60Hz , d)1KVA,100Hz
Answers were Sorted based on User's Feedback
A)1kVA,25Hz
Transformer size is inversely propotional to frequency as we have to increase no of turns for low frequency to produce same impedance
Is This Answer Correct ? | 16 Yes | 1 No |
Back emf is equal to 4.44 flux x frequency x turns . For the given voltage if the frequency is reduced , flux should be increased and hence the larger core or more number of turns
Is This Answer Correct ? | 10 Yes | 0 No |
A) 1kVA , 25 Hz as size is inversely propotional to frequency because we have to increase turns to produce same impedance for low frequency
Is This Answer Correct ? | 8 Yes | 0 No |
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