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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 a 210 V source. What kVA load can be supplied without exceeding the current rating of the windings? (assume an ideal transformer for this part)(b) Find the efficiency with the kVA loading of part (a) and 0.8 power factor.
Two Random variables have a joint probability distribution function defined by F(x,y)=0 X 1y>1 A). Sketch this distribution function. B). Find the joint probability density function and sketch it.
a) Find the general solution of the homogeneous ODE (the left hand side) and call it yh. b) Verify that yp= -0.5tcos(3t) is a solution.. i.e show that yp" + 9yp'= 3sin(3t). c) Construct the general solution of this ODE y=yh+yp
A single phase transformer has the following rating: 120 kVA, 2000 V/100 V, 60 Hz with 1000 primary turns. Determine: (a) the secondary turns (b) the rated primary and secondary currents (c) the maximum flux
Operation of NPN Bipolar Transistor : a. Describe the operation of a typical NPN bipolar junction transistor used both as an amplifier and a switch. b. List the 4 regions of operation and draw I-V characteristic curve.
Deer ticks can carry both Lyme disease (L) and human granulocytic ehrlichiosis (H). In a study of ticks in the Midwest, it was found that 16% carried L, 10% carried H and 25% that had either L or H carried both.
if the analog signal to be quatized is a sinusoidal wave form x(t)=9.5sin(2000*pi*t), and if the bipolar quatizere uses 6 bits - what are the number of quantization levels - quantization step size or resolution, delta, assuming the signal range
Why then do we even use JFETs as amplifiers What is it that make them attractive even though they are non-linear? How do we minimize the effect of their non-linearity
Design a Finite State Machine which recognizes the serial pattern 111. Assume serial input is applied to input pin Sin and an output pin labeled Sout is 1 whenever the string is recognized. a) draw a state diagram of your design.
A single-phase 50-KVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding
A voltage v(t) = 359.3 cos(wt) is applied to a load consisting of a 10 resistor in parallel with a capacitive reactance XC = 25. Calculate The instantaneous power absorbed by the resistor The instantaneous power absorbed by the capacitor
A majority gate returns a true output if more than half of the inputs are true. So, a 3-input majority gate outputs a ‘1' if at least two of its inputs are ‘1'. A minority gate generates the complement, that is it outputs ‘0' if at least two of th..
An unknown semiconductor has a bandgap of 1.1eV and Nc = Nv. It is doped with 10^15 cm-3 donors where the donors fully ionized. Given that EF is 0.25 eV below Ec, calculate the concentration of electrons and holes in the semiconductor at 300 K and..
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