What is the resonant frequency of a circuit which includes a coil of inductance 2.5 H and a capacitance of 40 μF? (Ans: 15.9 Hz )
Data Given:
Inductance = L = 2.5 H
Capacitance of capacitor = C = 40 μF = 40 x10⁻⁶ F
To Find:
Resonant Frequency = fr = ?
Solution:
The formula for resonant frequency is
fr = 12ㄫ√LC
By putting values
fr = 12x3.1415√2.5Hx40x10⁻⁶F
fr = 16.283√100x10⁻⁶s²
fr = 16.283√10⁻⁴s²
fr = 16.283x10⁻²s
fr = 0.159 x 10² s⁻¹
or
fr = 15.9 Hz -----------------Ans.
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