ECE :: Exam Questions Paper
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It is desired to design a phase shift oscillator using an FET having a gm = 5000 μSiemen, rd = 40 kΩ and feedback circuit value of R = 10 K. Then value of C for oscillator operation at 1 kHz and that of RD for A = 40 to ensure oscillator action are
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The type of feedback in the following circuit diagram
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Modem warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; and regretfully, there exist, people in military establishments who think that chemical agents are useful tools for their cause, which of the following statements best sums up the meaning of the above passage:
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A power of 100 W is radiated from an isotropic radiator. The power radiated peer unit solid angle and the power density at a distance of 10 km from the antenna is respectively
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For signal flow graph shown in following figure determine the ratio X5|X1. Use Mason's gain formula for signal flow graph.
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Consider following statements :
- Maximum energy of electrons liberated photoelectrically is independent of light intensity
- Maximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.
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The fourier transform of a voltage signal x(t) is X(f). The unit of X(f) is __________ .
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A diode detector load consists of 0.01 μF capacitor in parallel with a 5 k ohms resistor. The maximum depth of modulation without diagonal clipping at modulating frequency of 1000 Hz and 10 kHz is
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The inconsistency of Ampere's law can be removed by adding __________ to it.
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= 8 KΩ 
= 10 K 
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x(t).e- j
