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The light from a cameras electronic flash is produced when a highvoltage obtained by charging a capacitor is applied to electrodesin a xenon-filled flash bulb.
(a) to what voltage would a 60-microfarad capacitor be charged by a6mA current lasting 10 seconds?
(b) if the bulb when conducting current and emitting light acts asan 0.1-ohm resistor what is the time constant for discharging thiscapacitor?
(a) Find the electric field intensity using Cartesian vectors, Ecart, at the free space point P(-2.00 m, 5.00 m, 2.00 m). (b) Find P in spherical coordinates. (c) Find the electric field intensity using spherical vectors, Espher.
A simple power system consists of a dc generator connected to a load center via a transmission line. The load resistance is 8 ohms. The transmission line is 40km copper wire of 4 cm diameter. If the voltage at the load side is 400 V, compute Volta..
Determine the Fourier Series representation of the signal x(t)=-1-2cos(27pi(t)-(pi/4))+cos(63pi(t)-(pi/2)).Sketch the two-sided spectrum of the same signal above.
Show that the time displacement in a periodic function has no effect on the magnitude spectrum, but changes the phase spectrum by an amount of -nω0τ radians for the component of the frequency nω0 if the time displacement is τ.
Three single-phase, two-winding transformers, each reated 450 MVA, 20 kV/288.7 kV with leakage reactance Xeq=0.12 per unit, are connected to form a three-phase bank. The high voltage windings are connected in Y with solidly grounded neutral.
Electrostatic scaling: prove that electrostatic force between the two plates of a charged capacitor is a surface force (~L2); How about the stored energy under constant voltage on the capacitor (~L1, ~L2, or ~L3). What is the breakdown electric fi..
Determine which waveform in each pair is lagging: a) 6 cos(100πt-1000) and -6 sin (2π60t+1300)b) cos(10t-1000) and - cos(t-1000) c) cos (50πt - 1000) + cos (50πt - 200) and 9 cos (100πt - 200)
The transmitter has a power of 7 watts and the receiver needs at least 266 milliwatts to operate. Which is the maximum attenuation in dB allowed (value must be negative)
For the given circuit, determine the function of it I.e. is it OR gate? Or AND gate,.. Show all your answer, also draw the symbol and truth table of it.
The antenna used as the transmitter has a gain of 16.6 dB and the receiving antenna has an effective area of 16.6 m2. We measure the average conductivity of the ground as s = (1.2)10-4 S/m. (a) What is the free-space wavelength at the operating fre..
Also assume the house power wiring Has the two wires routed around the floor and ceiling. Determine the induced voltage at the power input to a digital computer that is connected to the power net for a lightning channel 1 km away.
The armture of 2 -pole , 200 volts , wave wound DC machine has 400 conductors and runs at 300 r.p.m . Calculate the useful flux per pole.
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