Question

In a series L.C.R. circuit, the potential drop across L, C and R respectively are 60 V, 140 V and 60 V. Then the source voltage is ____________.

विकल्प

• 220 V

• 160 V

• 180 V

• 100 V

Answer 1

In a series L.C.R. circuit, the potential drop across L, C and R respectively are 60 V, 140 V and 60 V. Then the source voltage is 100 V.

Explanation:

Given, e_L = 60 V; e_C = 140 V; e_R = 60 V

`therefore "Source voltage, e" = sqrt ("e"_"R"^2 + ("e"_"L" - "e"_"C")^2)`

`= sqrt ((60)^2 + (60 - 140)^2)`

`= sqrt ((60)^2 + (80)^2)`

`therefore "V" = 100  "volt"`