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In a series L-R circuit, connected with ...

In a series `L-R` circuit, connected with a sinusoidal ac source, the maximum potential difference acrosssd `L` and `R` are respectively 3 volts and 4 volts
At the same instant, the magnitude of the potential difference in volt, across the ac source will be

A

`3 cos 67^(@)`

B

`5 sin 37^(@)`

C

`4 cos 97^(@)`

D

0

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The correct Answer is:
B
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