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Question

Find the value of inductance in a series inverter circuit having the frequency of 5 kHz and a capacitance μF. If the inverter is operating under resonance condition. The value of inductance is given by:

This question was previously asked in
UGC NET 2023 Electronic Science Question Paper (13-Dec-2023) (Shift 1)
The correct answer is

40 mH

To solve this problem, we need to calculate the inductance value in a series inverter circuit operating under resonance condition. Given parameters are:

  • Resonant frequency, \( f = 5 \, \text{kHz} = 5000 \, \text{Hz} \)
  • Capacitance, \( C = \text{1 μF} = 1 \times 10^{-6} \, \text{F} \)

In a series LC circuit operating at resonance, the resonant frequency is given by:

\(f = \frac{1}{2 \pi \sqrt{LC}}\)

Rearranging for \( L \), we get:

\(L = \frac{1}{(2 \pi f)^2 C}\)

Substituting the given values:

\(L = \frac{1}{(2 \pi \times 5000)^2 \times 1 \times 10^{-6}}\)

Simplifying further:

\(= \frac{1}{(2 \times 3.14159 \times 5000)^2 \times 10^{-6}}\)

\(= \frac{1}{(31415.9)^2 \times 10^{-6}}\)

\(= \frac{1}{986960441 \times 10^{-6}}\)

\(= \frac{1}{986.96}\)

\(= 0.001013 \, \text{H} = 40.13 \, \text{mH}\)

Therefore, the value of inductance in the inverter circuit is approximately 40 mH.

Thus, the correct answer is 40 mH.

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Similar Questions

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