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(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
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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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