99 Percentile Qs Bank for JEE MainPhysicsAlternating Current
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f . When current in the circuit leads the voltage by 45^ , the value of C is
Options
- A1 2 f(2 f L+R)
- B1 2 f(2 f R+L)
- C2 2 f(R+L)
- D2 2 f (R+ 1 L )
Correct answer
A. 1 2 f(2 f L+R)
Step-by-step solution
Current leads the voltage by 45^ array rlrl & & & =45^ Since, , & & = X_C-X_L R & 1 & = X_C-X_L R array aligned & 1 C - L & =R & 1 C & =R+ L & C & = 1 [R+ L] & C & = 1 2 f[2 f L+R] aligned