ISRO Scientist or Engineer Electronics May 2017
For the following questions answer them individually
The electric field of a plane wave propagating in a lossless non-magnetic medium is given by the following equation $$\overrightarrow{E} (Z,t)= \cos (2 \pi \times 10^{9} t+\beta Z)\hat{a_{x}}+2 \cos (2 \pi \times 10^{9} t +\beta Z+\frac{\pi}{2}) \hat{a_{y}}$$ The type of wave polarization is
A ring of radius R carries a linear charge density $$\lambda$$ . It is rotating with angular speed $$\omega$$ . The magnetic field at its center is
A transmission line with a characteristic impedance of 100 Ω is used to match a 50 Ω section to a 200 Ω section. If the matching is to be done both at 500 MHz and 1.2 GHz, the length of the transmission line can be approximately,
The open-loop DC gain of a unity negative feedback system with closed loop transfer function $$\frac{(S+4)}{(S2+7S+13)}$$ is
The unit impulse response of a system is h(t)=e^{-t}, t>0 For this system, the steady-state value of the output for unit step input is equal to
A system has fourteen poles and two zeros. Its high frequency asymptote in its magnitude plot having a slope of
Consider a unity feedback system having an open loop transfer function $$G(j \omega)=\frac{K}{j \omega(j0.2 \omega +1)(j0.05 \omega+1)}$$ Find open loop gain (k) with gain margin of 20 dB
The open loop transfer function of a unity feedback system is G(S)=$$\frac{K}{S(S^{2}+S+2)(S+3)}$$ The range of K for which the system is stable is
For the CE (Common emitter) circuit shown, what will be the value of $$I_{E}$$ and $$V_{CE}$$?
