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Electronics and Communication Materials And Components Difficulty: Medium

In He-Ne laser, population inversion is achieved by

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Which of the following is the ratio of the throughput data rate per Hertz? For free space E = 50 cos(10 8 t + βx), then the value of β . . . . . . . . In a distortion factor meter, the filter at the front end is used to suppress An arbitrary signal m(t) has zero average value and it is band-limited to 3.2 kHz. It is sampled at the rate of 8 k samples/s. The samples are passed through an ideal band-pass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of the band-pass filter is Laplace transform of the given signal x(t) = u(t - 2) is