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A two-winding transformer rated at 9-kVA, 120/90-V, 60-HZ has a core loss of 200 W and a full-load copper loss of 500 W.
(a) The above transformer is to be connected as an auto transformer to supply a load at 120 V from 210 V source. What kVA load can be supplied without exceeding the current rating of the windings? (For this part assume an ideal transformer.)
(b) Find the efficiency with the kVA loading of part (a) and 0.8 power factor.
Rayleigh Scattering. Calculate the % increase is attenuation due to Rayleigh scattering exhibited by light having a free-space wavelength 1535 nm as compared to light having a free space wavelength 1550 nm. Provide your answer in units of [%] and ..
How can you make a low-pass filter with proper cut-off frequency to remove noise from a voice transmission using frequency spectrum What frequency cutoff would you use in that
Determine zero-input response of (D2+4D+40)y(t)=(D+2)x(t) with initial condition y0(0)=2 & dy0(0)/dt=16.78.
Design a full-wave bridge rectifier to deliver 12DC with less than 0.1V ripples into a load drawing 100mA. Specify any components as well as the input AC voltage required. Assume 0.6V diode drops.
Three screws are drawn at random from a lot of 100 screws, 10 of which are defective. Find the probability that the screws drawn will be nondefective in drawing (a) with replacement, (b) without replacement.
Design a circuit to give uninterrupted 5 V dc power supply with 110 V 60 Hz line voltage as input. The dc output should be available in case of power outage (110 V line supply). In case of line failure, the circuit should switch to backup source t..
A liquid level system converts a 4-10 m level into a 4-20mA current. Design a three mode controller (PID im assuming) that outputs 0-5 volts with 50% PB, 0.03 min integration time, and 0.05 min derivative time.
A typical method of measuring the linearity of an amplifier is called the "Two-tone" test. Signals at f1 and f2 are input to the amplifier and the output spectrum is observed. Assuming that signals at 14.1 and 14.2 MHz are input to an amplifier.
assume single pulse of ampltude (+1) transmitted through a band-limited noise free channel.The sampled output of the reciever filter is y y= [0.32 0.98 0.25] Determine a three-tap adaptive linear equalizer when the recieved power is 0.15W.
Explain why the following act lead to hazardous safety conditions when working with electrical equipment. (a) wearing metal rings or bracelets (b) being barefoot,(c) working on damp or concrete floor
an inductive circuit takes a current of 10.5 amperes when connected to a 500 volts 50c/s supply. this current rises to 12.5 amperes when frequency is reduced to 40 c/s. the voltage being maintained constant. find the resistance and inductance of t..
Binary data is transmitted at the rate of Rb bits/sec over a channel occupying a bandwidth B and the channel SNR=3 dB. If the data bit rate is increased to 2.65Rb and the bandwidth is increased to 1.75B i.
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