JEE Advanced 2017 Physics question
The instantaneous voltages at three terminals marked , and are given by
=ω t,
=(ω t+) and
=(ω t+).
An ideal voltmeter is configured to read *rms* value of the potential difference between its terminals. It is connected between points and and then between and . The reading(s) of the voltmeter will be
Answer: (A),(D)
Solution
Two equal sinusoids differing in phase by have a difference of amplitude . Between X and Y (): amplitude , so
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