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Q. Comment brie?y on the following:
(a) Why are waveguides not used at low frequencies?
(b) Why are open-wire lines not generally used as guiding structures at very high frequencies?
(c) What is the velocity of wave propagation in a Te?on (εr = 2.1) coaxial transmission line?
Q. For a JKFFwith JK = 11, the output changes on every clock pulse. The change will be coincident with the clock pulse trailing edge and the flip-flop is said to toggle, when T = 1
i. Each computer related to the public internet has a unique Internet Protocol address caleed as the IP address. The IP address is a 32-bit address. What is the maximum number of c
12. A capacitor is to be constructed so that its capacitance is 0.2µF and to take a p.d. of 1.25kV across its terminals. The dielectric is to be mica which, after allowing a safety
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The power transferred across the air gap of a two pole inductionmotor is 24 kW. If the electromag netic power developed is 22 kW, find the slip. Calculate the output torque if the
A DC shunt motor rotating at 1560 RPM is supplied from a 240-V source. The line current supplied to the motor is equal to 27 A. The shunt field resistance of the motor is equal to
What is the desirable properties of an insulation material? Insulation materials have the desirable properties are as follows: 1. Very fine dielectric strength such as of mi
Two identical three-phase, 33-kV, wye connected, synchronous generators operating in parallel share equally a total load of 12 MW at 0.8 lagging power factor. The synchronous react
Circuits Typical electronics circuits are created out of a basis set of primitive elements such as capacitors, voltage sources, resistors, transistors and inductors. T
Q. Using two 8-to-1multiplexers and one 2-to-1multiplexer, show how a 16-to-1 multiplexer can be obtained in the form of a block diagram.
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