18. Two sinusoidal e.m.f.s of peak values 50 V and respectively but differing in phase by 30° are induced

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Please show me how they got 68.0V(resultant e.m.f) and and 48.1V(phase relative) as the answers.

18. Two sinusoidal e.m.f.s of peak values 50 V and 20 V
respectively but differing in phase by 30° are induced
NATING VOLTAGE AND CURRENT
221
the resultant e.m.f. and its phase relative to e.m.f. ea.
Check the results by means of a phasor diagram drawn
to scale. If the connections to coil B were reversed,
what would be the maximum value of the resultant
e.m.f. and its phase relative to e?
Transcribed Image Text:18. Two sinusoidal e.m.f.s of peak values 50 V and 20 V respectively but differing in phase by 30° are induced NATING VOLTAGE AND CURRENT 221 the resultant e.m.f. and its phase relative to e.m.f. ea. Check the results by means of a phasor diagram drawn to scale. If the connections to coil B were reversed, what would be the maximum value of the resultant e.m.f. and its phase relative to e?
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