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Fynjy0 [20]
3 years ago
5

The inductor in the RLC tuning circuit of an AM radio has a value of 250 mHmH . You may want to review (Pages 857 - 860) . Part

A What should be the value of the variable capacitor in the circuit to tune the radio to 731 kHz kHz
Physics
1 answer:
ANEK [815]3 years ago
6 0

Answer:

The value of variable capacitor is 1.89 \times 10^{-13} F

Explanation:

Given :

Inductance L = 250 \times 10^{-3} H

Frequency f = 731 \times 10^{3} Hz

According to the cutoff frequency,

   f = \frac{1}{2\pi \sqrt{LC} }

Now we find the value of capacitance,

  C = \frac{1}{4\pi ^{2} f^{2}  L }

  C = \frac{1}{4\times 9.85 \times (731 \times 10^{3} )^{2} \times 250 \times 10^{-3}  }

  C = 1.89 \times 10^{-13} F

Therefore, the value of variable capacitor is 1.89 \times 10^{-13} F

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