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Assume the factory described in the previous problem is fed from a line having an impedance of 0.02 + j0.16-ohm. The voltage at the factory is maintained at 480 V(rms). Find the average power loss in the line before and after the load is added. Find the magnitude of the voltage at the sending end of the line before and after the load is added.
Operation of NPN Bipolar Transistor : a. Describe the operation of a typical NPN bipolar junction transistor used both as an amplifier and a switch. b. List the 4 regions of operation and draw I-V characteristic curve.
A cellular radio transmitter has a power output of 3W at 800 MHz. It uses an antenna with a gain of 3 dBi. The receiver is 5 km away, with an antenna gain of 12 dBi. Suppose that the transmission line losses are 1 dB at the transmitter
A glass tube with a cross-sectional area of 9^-2 m^2 contains an ionizd gas. The densities are 10^15 positive ions/m^ and 10^11 free electrons/m^3. Under the influence of an applied voltage, the postive ions are moving.
Allocate this block to 3 different customers. Customer 1 requires a block at least 10 addresses, customer 2 requires 254 addresses, customer 3 requires 2 addresses. Give a possible allocation of these subnets using the CIDR prefix notation.
The current through a branch in a linear network is 2 A when the input source is 10 V. If the voltage is reduced to 1 V and the polarity is reversed, the current through the branch is a. - 2 A b. - 0.2 A c. 0.2 A
Three point charges are positioned in the x-y plane as follows: 5 nC at y = 5 cm, -10 nC at y = -5 cm, and 15 nC at x = -5 cm. Find the required x-y coordinates of a 20-nC fourth charge that will produce a zero electric field at the origin.
The resistance of the field circuit of a shunt-excited dc generator is 200. When the output power of the generator is 100kW, the terminal voltage is 500V and the generated e.m.f is 525V.
An ADSL signal uses 250 channels, each of 4 kHz bandwidth. Assume the maximum signaling rate to be 1 symbol/Hz. QAM is used within each channel with up to 64 point constellations. What is the bit rate/channel
The voltage V across a semi conductor in a computer is given by V= aI+BI^2, where I is the current (in A). If a 24 V battery is conducted across the semi conductor, find the current if a=4 ohms and B= 0.5 ohms/A.
Calculate: i. The A, B, C, D constants of the line. ii. The characteristic impedance of the line. iii. The sending-end voltage iv. The sending-end current. v. The sending-end power factor. vi. The sending-end power. vii. The power loss in the line..
What is the bandwidth required so that the modulated signal contains atheist 90% of the power of the unmodulated carrier. A carrier signal c(t) = 10 cos(2pifct) is modulated using a message signal m(t) cos(20pit). The modulation is FM, with kf = 50.
Approximately how many harmonics terms are required in the Fourier Series of a bipolar square wave with 50% duty cycle and amplitude A to represent 99% of its power?
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