A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

10.62 MHz

10.62 kHz

5.31 mHz

5.31 kHz

Solution

10.62 kHz

The frequency is given as
$straight f space equals space fraction numerator 1 over denominator 2 πμτ end fraction straight tau space equals space RC therefore space straight f space equals open parentheses space fraction numerator 1 over denominator 2 πRC end fraction close parentheses$
μ =0.6
R = 100 k = 100 x1000 Ω
c = 250 pico farad = 250 x 10-12 F
So,
$straight f space equals space fraction numerator 1 over denominator 2 straight pi space straight x space 0.6 space straight x space 1000 space straight x 100 space straight x 250 space straight x 10 to the power of negative 12 end exponent end fraction rightwards double arrow straight f equals space fraction numerator 1 over denominator 9.42 space straight x 1 to the power of negative 5 end exponent end fraction space equals space 0.1061 space straight x space 10 to the power of negative 5 end exponent straight f space equals space 10.61 space kHz$

Some More Questions From Wave Optics Chapter

Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?

Frequencies in the UHF range normally propagate by means of

Digital signals
(i)    do not provide a continuous set of values,
(ii)    represent values as discrete steps,
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(iv)    can utilize decimal as well as binary systems.
Which of the above statements are true?

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Wave Optics

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

10.62 MHz

10.62 kHz

5.31 mHz

5.31 kHz

Some More Questions From Wave Optics Chapter

Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?

Frequencies in the UHF range normally propagate by means of

Digital signals
(i)    do not provide a continuous set of values,
(ii)    represent values as discrete steps,
(iii)    can utilize binary system, and
(iv)    can utilize decimal as well as binary systems.
Which of the above statements are true?

What is space wave propagation?

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NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Wave Optics

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it. 10.62 MHz 10.62 kHz 5.31 mHz 5.31 kHz

Some More Questions From Wave Optics Chapter

Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?

Frequencies in the UHF range normally propagate by means of

Digital signals(i) do not provide a continuous set of values,(ii) represent values as discrete steps,(iii) can utilize binary system, and(iv) can utilize decimal as well as binary systems.Which of the above statements are true?

What is space wave propagation?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

10.62 MHz

10.62 kHz

5.31 mHz

5.31 kHz

Digital signals
(i) do not provide a continuous set of values,
(ii) represent values as discrete steps,
(iii) can utilize binary system, and
(iv) can utilize decimal as well as binary systems.
Which of the above statements are true?