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1. If an electrical load on an air-conditioning system is not working, what must the technician try to determine?
2. What does an electrical connection diagram show?
3. List the measurements that need to be taken to determine the extent of a mechanical problem in an air-conditioning system. How are normal coil operating temperatures for an airconditioning system determined?
Two transistors, fabricated with the same technology but having different junction areas, when operated at a base-emitter voltage of 0.72 V, have collector currents of 0.2 mA and 12 mA. Find Is for each device.
Portions of a 1/2 X 1/2-in. square bar have been bent to form the two machine components shown. Knowing that the allowable stress is 15 ksi, determine the maximum load that can be applied to each component.
If you are going to use a Yz5 to lower a voltage of 13.8kV down to208V,m and are specifying the three single phase transformers that you will use, for each of the single phase transformers, what is its rated primary voltage, rated secondary voltag..
Design a three-line to eight-line (3-to-8) decoder which will decode three input variables into eight outputs. An application of this decoder is a binary-to-octal conversion, where the input variables represent a binary number and the outputs repr..
The primary voltage magnitude is 2400 V under these conditions and the efficiency is 0.97. Find the equivalent circuit parameters of this transformer neglecting the no load circuit.
An amplifier operating from a single 15-V supply provides a 12-V peak to peak sine wave signal to a 1-k ohm load and draws negligible input current from the signal source. The dc current drawn from the 15-V supply is 8mA.
A number equal to the sum of its coordinates is assigned to each point in a rectangular room having three of its contiguous edges as the coordinate axes. Draw a sketch of the constant-magnitude surfaces for the number field generated in this manne..
The inductance of a closely packed coil of 400 turns is 9.5 mH. Calculate the magnetic flux (per winding) through the coil when the current is 5.0 mA.
A coil of wire having negligible resistance and an inductance of 0.248 henry is connected to a 117-volt 50-cycle source.
f(t) = (2+j2)e^(-3jt)+j2e^(-jt)+3-j2e^(jt)+(2-j2)e^(j3t) a) Sketch the exponential fourier spectra b) By inspection of part a sketch the trigonometric Fourier spectra c) Find the compact trigonometric Foreir series
Electrons are in random motion in a fixed region in space .During 1 sec interval, the probability of finding an electron in a subregion of volume 10^(-15) m3 is 0.23. What volume charge density , appropriate for such time durations, should be assig..
The transfer function of a circuit is given by H(s)=2 s+4/4s^2+2s+2 a. Express the transfer function in a form in which the coefficients of the highest power of s are unity in both numerator and denominator. b. What is the characteristic equation o..
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