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A residential four-wire system supplies power at 220V rms to the following single-phase appliances: On the first phase, there are ten 75-W bulbs. On the second phase, there is a 750-W vacuum cleaner with a power factor of 0.87. On the third phase, there are ten 40-W fluorescent lamps with power factor of 0.64.
Find (a) The current in the neutral wire. (b) The real, reactive, and apparent power for each phase.
Compute the homogeneous solution yh(t). Compute the particular solution yp(t).
A circuit is needed to display a 4-bit value on the LEDs of the logic designer. This value can come from two different sources. Design a circuit using four 2-to-1 multiplexers to select which of the two values to display on the LEDs.
Finding the periodicity in N of the discrete time signal x(n) = Cos(3pi*Ts.n + pi/4) and then plotting the discrete signal. From this the condition on the sampling period is determined
A terminated transmission line with Z0 = 60 ohm has a reflection coefficient at the load of = 0.4 60. (a) What is the load impedance (b) What is the reflection coefficient 0.3 away from the load (c) What is the input impedance at this point
Estimate the diffusivity of a spherically shaped protein with a MW of 36,000 in water at 37oC.
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x = -2.0 cm. A second, parallel wire carrying a 3.0 A current intersects the x-axis at x = +2.0 cm.
how does the D'Arsonval movement work with voltmeter and ammeter i know how to design the cicuits but a little more of how the movement actually work in both cases. like for the ammeter the reason the resistor is place in parallel is to limit the ..
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.
A waveform generator is connected to an op-amp which has been setup as a voltage follower. The voltage follower is then loaded with a 50 Ohm resistor. What output impedance setting should the waveform generator use
Now that you have gained some familiarity with solar cells and their characteristics, what are your impressions about the efficiencies of these devices What are some applications for solar cells that are currently being used Why is this technology..
Finding rms current through Capacitor and Inductor, A circuit consists of a sine wave signal generator and a reactive component (L or C). The output of the generator is a sine wave with a peak amplitude of 8.8 volts at a frequency of 10.0 kHz.
find the complete functions, p(t) and w(t) supplied by the element, not just a number, and graph p(t) and w(t). Choose appropriate intervals of time for your graphs. Assume that both v(t) and i(t) are zero for t
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