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A 5 km long three transmission line is required to supply a load of 5MVA at 0.8 power factor lagging at 33kV throughout the year. The cost of cable including installation is (20a + 20) Rand per meter (where 'a' is the cross-sectional area of the conductor in cm2). The cost of energy is 11 cents per kWh, interest and depreciation charges amount to 12%. Assume the resistivity of the conductor to be 1.73μΩcm and calculate the most economical conductor size.
An amplifier with Ri = 2 kΩ, Ro = 500Ω, and Rmoc = -107 is operated with a 1-kΩ, load. A source having a Thévenin resistance of 1kΩ and an open-circuit voltage of 2 cos(200 πt) mV is connected to the input terminals. Determine the output voltage a..
The result of the subtraction is to be read by Port A, bits PA4-PA7.
An electric flux density is given by D = D0 a, where D0 is a given constant. (a) What charge density generates this field (b) For the specified field, what total charge is contained within a cylinder of radius a and height b
compute the minimum required smoothing capacitor.
Explain the assumptions you made about cardinalities in your answer to part b. Explain why it is said that the E-R data model is more expressive or more semantically rich than the relational data model.
how does Intel's architecture differ from MiPS?
The s-plane diagram of a filter shows that it has a cluster of four poles in the left-half s-plane that are arranged in a semi-circle near +/- j628. The filter also has two zeroes at the origin.
a binary transmission channel introduces bit errors with probability 0.15.estimate the probability that there are 20
A binary PAM communication system is used to transmit data over an AWGN channel. The prior probabilities for the bits bn are P[bn= 1] = 1/3 and P[bn= 0] = 2/3. Determine the optimum threshold (to be compared with the demodulator output) at the dete..
The bellows, diaphragm, and Bourdon tube pressure sensors all exhibit secondorder time response.- Calculate the bellows deflection for a pressure of 20 psi and the natural frequency of oscillation.
An electric field is expressed in rectangular coordinates by E = 6x2ax + 6y ay +4az V/m. Find: a.) VMN if point M and N are specified by M(2,6,1) and N(-3, -3, 2). b.) VM if V = 0 at Q(4, -2, -35)
Determine the voltage required on the input of the amplifier to give the maximum output of 85 dBuV. If the signal level from the aerial is 5 dBmV and the input noise level is 20 dBuV, calculate the signal-to-noise ratio on the output of the amplifi..
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