First slide

AC Circuits

Question

An AC circuit has $R = 100 Ω, C = 2 μ F a n d L = 80 m H$ , connected in series. The quality factor of the circuit is :

Easy

A

2
B

400
C

0.5
D

20

Solution

$Q = (\sqrt{\frac{L}{C}}) \frac{1}{R} = \sqrt{\frac{80 \times 10^{- 3}}{2 \times 10^{- 6}}} \times \frac{1}{100} = 2$

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