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Calculate the bandwidth in series RLC circuit if the frequency is 20 Hz and the quality factor is 5.

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Calculate the bandwidth in series RLC circuit if the frequency is 20 Hz and the quality factor is 5.

(a) 2 Hz

(b) 4 Hz

(c) 6 Hz

(d) 8 Hz

This question was addressed to me in quiz.

My doubt stems from Countercurrent Braking of DC Shunt Motors topic in chapter Braking of DC Motors & Induction Motors of Electric Drives

1 Answer

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Right answer is (b) 4 Hz

For explanation I would say: Bandwidth is defined as the range of frequencies for which the signal exists. Selectivity is inversely proportional to the bandwidth. B.W(Hz)=f÷Q=20÷5=4 Hz.

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