# Electrical Engineering - RLC Circuits and Resonance - Discussion

### Discussion :: RLC Circuits and Resonance - General Questions (Q.No.5)

5.

A 12 resistor, a 40 F capacitor, and an 8 mH coil are in series across an ac source. The resonant frequency is

 [A]. 28.1 Hz [B]. 281 Hz [C]. 2,810 Hz [D]. 10 kHz

Explanation:

No answer description available for this question.

 Srinu said: (Jan 26, 2011) f=1/{2(pi)*sqrt(L*C)}

 Nibhas said: (Aug 31, 2013) What is pi formula?

 Rohit Jayara said: (Dec 19, 2013) What is pi formula? please tell me.

 Akshaya said: (Mar 1, 2014) pi has a constant value = 3.14.

 Sandy said: (Aug 31, 2014) f = (1/2*pie*sqrt(LC)).

 Arun Dahiwal said: (Jan 7, 2015) RLC circuit and resonance.

 Anand said: (Jul 21, 2015) At resonance Xc = XL. i.e 4 1/(2*3.14*C*F) = 2*3.14*L*F. F = 1/(2*3.14*sqrt(L*C)). By substituting values we get F = 281 Hz.

 Jomel said: (Jul 22, 2016) What is the exact formula f = (1/2 * pi * sqrt(LC)) or f = 1/(2 * pi * sqrt(LC)?

 Faiza Malik said: (Dec 8, 2018) Exact formula is calculated as; XL=XC. 2*π*f*L=1/(2*π*f*C). for frequency we can simply it as; 2*π* f^2 *L=1/2*π*C. f=1/2*π*√(L*C).