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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. The power gain of an antenna is 10,000. If its input power is 1 kW, calculate the maximum radiation intensity that it can generate.
The no-load and blocked-rotor tests on a three phase, wye-connected induction motor yield the following results: • No-load test: line-to-line voltage 400 V, input power 1770 W,
Faraday's Law Faraday's laws of electromagnetic induction state: i) An induced e.m.f is setup when the magnetic field linking that circuit changes ii) The magnitude of
First Quadrant or Class A chopper A chopper two mode operation of class A chopper can be explained as follow.
Consider the operation of a dc shuntmotor that is affected by the following changes in its operating conditions. Explain the corresponding approximate changes in the armature curre
Lead Acid Accumulators : These are the most common storage batteries which can deliver a heavy current when short-circuited. There are also many other hazards with these accumulat
Energy Conservation Building Codes It encompass the norms and standards of energy consumption expressed in terms of per square meter of the area wherein energy is used. The
Q. In the circuit shown in Figure the switch opens at t = 0. Develop and execute a P Spice program to solve for v(t), and use PROBE to obtain a plot of v(t). Hint: Use the follo
Calculate the following for a 2 hp and a 20 hp dc machine, each rated for 500 rpm. Use data from the Study Plan 1 data sheet, including "hot" armature resistance value for all cal
Core Functionalities of the GIS: The GIS should be able to: 1 Create layers from all supported data sources involving coverage feature classes, shape files, compu
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