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A single-phase, half-wave SCR circuit is used to control the power consumption of an inductive load. The resistive component of the load is 5 Ohm. The source voltage is 120 V (rms). When the triggering angle is adjusted to 60 degrees, the average current of the load is 6A. Calculate the following:
a. Average voltage across the load
b. Conduction peroid in degrees.
A positive charge of magnitude q1 lies at the origin. Derive an expression for the incremental work done in moving a second point charge q2 through a distance dx from the starting position (x, y, z) in the direction -ax.
Write a ladder logic program needed to implement each of the following (assume inputs A, B and C are all normally open toggle switches).
The reliability of a certain automatic cutoff device is assumed 11/12. What is the reliability of a system consisting of 4 such devices so arranged
Analysis of link budget DTH QPSK Satellite link, A direct-to-home satellite television system uses a geostationary satellite in orbit above the equator at a longitude of 109 degrees west.
1.How is crude oil formed ?How is it found/discovered ? 2.How is natural gas formed? (Start with plankton) and include crude oil formation.
Compute the unit-pulse response h[n] for the discrete-time system y[n+2]2y[n+1]+y[n]=x[n] (for n = 0, 1, 2, 3).
Determine the maximum and minimum spectral frequencies received from a stationary GSM transmitter that has a center frequency of exactly 1950.000000 MHzassuming that the receiver is traveling at speeds of.
Suppose a turbine is used for generating electricity, estimate the ratio of powers generated by the same speed water and air. (Water density=1g/cm3, air density =1.2kg/m3)
A temperature sensor has a static transfer function of 0.15 mV/C° and a time constant of 3.3 s. If a step change of 22° to 50° C is applied at t=0, find the output voltage at 0.5 s from t=0s to t=10s. What is the indicated temperature at these tim..
Consider a three-phase distribution feeder with line reactance of10 ohm supplying a three-phase Y-connected load of 200 kVA at power factor of 0.85 lagging.
A radio receiver has a noise power N = kTB watts, with T = 100 K and B = 1.0 MHz. The value of k is 1.38 x 10^-23 J/K. What is the noise power in dBW?
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..
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