Question

In a series L-R circuit, connected with a sinusoidal ac source, the maximum potential difference across L and R are respectivaly 3 volts and 4 volts.
At the same instant, the magnetitude of the potential difference in volt, across the ac source may be
A. `4+3sqrt(3)`
B. `(4+3sqrt(3))/2`
C. `1+sqrt(3)/2`
D. `2+sqrt(3)/2`

Answer 1

Correct Answer - B
`E=V_(R)+V_(L)=2+(3sqrt(3))/2=(4+3sqrt(3))/2`