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For the following questions answer them individually
An amplifier has an input power of 2 microwatts. The powergain of the amplifier iis 60 dB. The output power will be
Which vacuum based deviceis widely used as a power amplifier in satellite communication systems?
Maxwell’s equations establish the relationship between $$\overline{E}, \overline{D}, \overline{H}$$ and $$\overline{B}$$ at any point in a continuous medium. When we move from one medium to another, then which of the following statement is correct
The input impedance of shortcircuited lossless line of length less than a quarter-wavelenth is
The intrinsic impedanceof free space is 377 Ω. The approximate intrinsic impedance of a medium with relative premittivity and permeability of 4 and 1 respectively will be
A 8 kHz communication channel has an SNR of 30 GB.If the channel bandwidth is doubled, keeping the signal power constant, the SNRfor the modified channel will be
In which modulation system, when modulating frequency is doubled, the modulation index also becomes double.
The matrix $$A = \begin{bmatrix}-4 & -3 & -3 \\1 & 0 & 1 \\ 4 & 4 & x \end{bmatrix}$$ is its own adjoint. The value of x will be
