MHT CET202311 May 2023Evening ShiftPhysicsAlternating CurrentActual
The a.c. source is connected to series LCR circuit. If voltage across R is 40 ~V , that across L is 80 ~V and that across C is 40 ~V , then the e.m.f. 'e' of a.c. source is
Options
- A40 ~V
- B40 2 ~V
- C80 ~V
- D160 ~V
Correct answer
B. 40 2 ~V
Step-by-step solution
The emf across the AC source is given as: aligned e & = ( V _ K )^2+ ( V _ c - V _ L )^2 = (40)^2+(80-40)^2 e & = 3200 e & =40 2 ~V aligned