Question

на какую длину волны настроен радиоприемник, если приемный контур обладает индуктивностью 2 мГн и емкостью 500 пФ

Answer 1

Длина волны= скорость * период   скорость э-м волны равна скорости света= 3 * 10^8  m/c   период определи по формуле Томсона  T= 2 п корень из CL

Answer 2

Radio Receiver Tuning Frequency Calculation

To calculate the tuning frequency of a radio receiver when the receiving circuit has an inductance of 2 mH and a capacitance of 500 pF, we can use the formula for the resonant frequency of an LC circuit:

Resonant frequency (f) = 1 / (2 * π * √(L * C))

Where: - f is the resonant frequency - L is the inductance in henries - C is the capacitance in farads - π is a mathematical constant approximately equal to 3.14159

Substituting the given values: - L = 2 mH = 0.002 H - C = 500 pF = 500 × 10^-12 F

We can calculate the resonant frequency using the formula.

Resonant frequency (f) = 1 / (2 * π * √(0.002 * 500 × 10^-12))

Resonant frequency (f) ≈ 1 / (2 * 3.14159 * √(0.002 * 500 × 10^-12))

Resonant frequency (f) ≈ 1 / (2 * 3.14159 * √(1 × 10^-9))

Resonant frequency (f) ≈ 1 / (2 * 3.14159 * 1 × 10^-4)

Resonant frequency (f) ≈ 1 / (6.28318 * 1 × 10^-4)

Resonant frequency (f) ≈ 1 / 6.28318 × 10^-4

Resonant frequency (f) ≈ 159154.943 Hz

Therefore, the radio receiver is tuned to a frequency of approximately 159 kHz.

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