In `RLC` circuit, at a frequency `v`, the potential difference across each device are `(Delta V_(R))_("max") = 8.8 V, (Delta V_(L))_("max") = 2.6 V` and `(Delta V_(C ))_("max") = 7.4 V`. The composed potential difference `(Delta V_(C ) + Delta V_(L))_("max")` across inductor and capacitor is

Options

A. `10 V`
B. `7.8 V`
C. `7.4 V`
D. `4.8 V`

Answer

D

Explanation

In series `R-L-C` circuit, `V_(L)` and `V_(C )` are always opposite in phase.
`:. (Delta V_(c ) + Delta V_(L)) = 7.4 - 2.6 = 4.8 V`