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The DC resistance of the primary windings of a certain transformer is found to be 22ohm while the resistance of the secondary windings is 0.8ohm. When a 60 Hz sinusoidal source is connected to the primary "with the secondary open circuited" and the primary voltage is adjusted to be 15V peak-to-peak, the primary current entering at the dot is found to be 35mA p-to-p, lagging the voltage by 87deg. The open circuit voltage on the secondary is measured with high-impedance scope probe to be 1.5 volts p-to-p. Then, by driving the secondary with the primary open circuited and the secondary voltage adjusted to be 2V p-to-p, the secondary current entering at the dot is found to be 20mA p-to-p, lagging the voltage by nearly 90 deg.
From these measurements determine an estimate for the self-inductances(L1 and L2), the mutual Inductance(M), and the coupling coefficien (k) of the transformer.
An automobile battery has an open-circuit voltage of 13.6 V and a total internal resistance of 0.012 ohms. What is the terminal voltage of the cell when it is delivering 250 A to the starter motor
Design a simple unipolar drive circuit such that the electrical time constant is 2 msec at phase turn-on and 1 msec at turnoff. The stepping rate is 300 steps per second. A three-phase variable-reluctance stepper motor has parameters.
Two three-phase loads are y-connected across a 300 Volt three phase line. One load draws 10kW at a p.f. of 0.9 leading, and the second load draws 8kW at a p.f. of 0.6 lagging. V(line-neutral)=300V/sqrt(3)=173.21V
a)Write the diffrenece equation for a four-term moving average filter. b) The input x[n] = cos(n pi/6)u[n] is passed through the four-term moving average filter. Solve for the first 5 samples of the output.
The cutoff frequencies of a series resonant circuit are 5400 Hz and 6000 Hz. a. Find the bandwidth of the circuit. b. If Qs is 9.5, find the resonant frequency of the circuit.
Define Root Locus and Routh-Hurwitrz, Use Routh-Hurwitz to find vales of K so that L = k (s+1) / (s^2 +4) (s+10) has poles to the left of s= -2
a voltage is given by v(t)=10sin(1000(pi)(t) + 30 degrees)V 1. use a cosine function to express v(t) in terms of t and the constant pi. find the frequency in hertz to two significant figures and appropriate units.
The tuning capacitor of a Wien bridge oscillator is 100 pF and the frequency is 5 kHz. To what value of capacitance pF should the capacitor be changed to if the frequency is to be changed to 2 kHz
Write the equation for the acceleration as a function of the position change of the platform.
From what distance must the electron be red if it is to just fail to strike the plate?
1- Describe the function of the program. DO NOT WRITE THE OPERATION OF EACH INSTRUCTION 2- Assuming that the branch instruction is executed (the branch is taken), comput the number of clock cycles required to execute the loop (DECA or BNE AGAIN)
A small buck converter has 24 V input and 12 V output. The transistot has Rds(on) = 0.1 Ohms. The diode is modelled as a 1 V drop. Each device has Rtheta(ja) = 40 K/W and Tjucntion
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