Consider a series resonance inverter with parallel-loaded delivers a load power of P of 3kW at a peak sinusoidal load voltage of Vp= 300V and at resonance. The load resistance is R=2 ohms. The resonant frequency is fo = 15 kHz. The voltage dc input needed to deliver such power to the load is equal to: Select one: a. 300 V b. 212.13 V c. None of these d. 86.04 V

Error propagation. We measure flux (f) and its uncertainty (df). Convert them into magnitude (m) and its uncertainty (dm).   The signal-to-noise ratio can be written as SNR=f/df. What is the magnitude uncertainty when SNR=0.1, 1, 10, and 100?

A Phase Modulator has a phase deviation constant, Kp = 35°/V. The carrier signal is ec = 8 cos2n(800k)t, volts and the modulating signal is em = 5 sin2r(2000)t, volts. a. What is the equation of the PM signal? b. What is the maximum phase deviation? c. what is the amount of deviation in the carrier phase angle at t = 160µs?

Given a 5uF cарасitor,compute the reactance of the following: a. at 50 Hz(ans: –j636.6198 ) rad b.at 100 (ans: -j2000 N) sec c. at 60 cps (ans: -j530.5165 N)

If vsig is a triangle waveform, determine the maximum amplitude that vsig can have? Showyour calculation.

Explain how does LCR circuit work, impedance of LCR circuit in resonance, condition for resonance in LCR circuit and also discuss quality factor in LCR circuit?

(B) The signal Vin(t)-2Cos(2nfit)+2Cs (2nfat), passes through a square-law device where the output signal Voft) is given by V-(Vin)2 and fi-2 KHz and f-6KHz. Calculate the average power at the output of the square-law device.

1. If we add a Zero into a system: I. The gain slop will be increased by 20db/decade at its corner frequency. II. The gain slop will be decreased by 20db/decade at its corner frequency. III. Gain will not be affected. IV. None of the above.  2. If we add a Pole into a system: I. The phase will be increased by 90 degrees. II. The phase will decrease by 90 degrees. III. Phase will not be affected. IV. None of the above.  3. In systems, the Integrator add slop to the system gain equal to: I. 20 db/decade. II. -20 db/decade. III. 0 db/decade. IV. None of the above 4. The purpose of the Lag Compensator is: I. Improve the study state response of the close system. II. Speed up the transit response. III. All the above. IV. None of the above.  5.  In the Lead Compensator: I. Z > P. II. Z < P. III. Z = P. IV. None of the above.

Q2: A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr, Pc, PsB, PUSB, PLSB and u are the total power, carrier power, side band power, upper side band power, lower side band power and modulation index respectively. Prove the following: a. Pc = Pr (m2) m2 b. PsB = Pr m2 PT c. PUSB = PLSB 2+m2 2+m2