MHT CET 2023 Physics question
The a.c. source is connected to series L C R circuit. If voltage across R is 40 V, that across L is 80 V and that across C is 40V, then the e.m.f. 'e' of a.c. source is
Answer: (B)
Solution
In a series LCR circuit the voltages across L and C are in opposite phase (180 degrees apart) and the voltage across R is in phase with the current, i.e. 90 degrees from both. The source e.m.f. is the phasor sum:
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