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for a motor rated Vrms=230v P=300w pf=0.75lagging,calculate the capacitance C needed to improve the power factor to unity assuem frequency =50Hz sketch current and voltage phasors.
If only two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair, find the spacing between the center of the nucleus and theaverage location of the electrons when the ap..
A voltage of 60cos(4πt) V appears across the terminals of a 3 m-F capacitor. Calculate the current through the capacitor and the energy stored in it from t=0 to t=0.125 sec.
Current on the surface of inner conductor is 4I going into the page (positive current flows into the page) or is in negative z direction while current on outer conductor surface is 2I in the reverse direction or positive Z- direction. I is the gen..
Design the basic cell of a universal shift register to the following specifications. The internal storage elements will bepositive edge-triggered D flip-flops. Besides the clock, theshifter stage has two external control inputs, S0 andS1, and thre..
A semiconductor device requires n-type material; it is to be operated at 400K. a) would Si doped with 10^15 atoms/cm^3 of Arsenic be useful in this applications. b) Could Ge doped with 10^15 cm^-3 antimony be used.
a capacitor, an electric resistance heater, and an impedance are connected in parallel to a 120 volt, 60 Hz. system. the capacitor draws 50 VARs, the heater draws 100 watts and the impedance coils draws 269 VA at a power factor of 0.74 lagging.
a magnetic circuit has a mean length of 0.80 m, a cross-sectional area of 0.06 m^2, and a relative permeability of 2167. connecting its 340-turn 64-ohm magnetizing coil to a DC circuit causes a 56-V drop across the coil. determine the flux density..
Determine the fundamental frequency w0, the period t0, and the coefficients in the representation X(t) = x0 + Re{k=1N Xkejkwot} for the above input. Remember, you can do this problem without evaluating any integrals.
For both designs, the supply voltage is nominally 9 V and varies by +/- 1V. For the first design, assume that the availability of supply current is not a problem, and thus operate the diode at 20mA. For the second design, assume that the current f..
At t = -250/6 μs, a sinusoidal voltage is known to bezero and going positive. The voltage is next zero at t = 1250/6μs. It is also known that the voltage is 75 volts at t =0. a) What is the frequency of v in herts
a. Implement both functions with one 3:8 decoder and logic gates. b. Implement both functions with one or more 8X1 muxes (and logic gates if needed) c. Implement both functions with 2X4 decoders and logic gates.
Design a circuit that will add either 1 or 2 to a 4-bit binary number N. Let the inputs N3, N2, N1, N0 represent N. The input K is a control signal. The circuit should have outputs M3, M2, M1, M0, which represent the 4-bit binary number M.
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