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Explain Thermoplastic materials.
Thermoplastic materials: The properties of such plastic materials do not change considerably when they are melted and after that cooled and solidify. They can be repeatedly dissolved or melted in various solvents. They are additional elastic, less brittle and do not lose elasticity while subjected to prolonged heating. They are less apt to age thermally. Again and again they can be remoulded in any shape after heating. Several of them possess extraordinary high insulating properties and they are water repellent. They are polymers of linear structure that is their molecules are elongated and are like thread. This, kind of structure is soluble, fusible, highly plastic, able of forming thin flexible threads as well as films. Illustrations are Polytetra Flouroethylene (P.T.F.E. or Teflon) and Polyvinyl Chloride (P.V.C.).
Explain Acceptance cone? The fibre air - core interface is display below: In this figure Omax is the maximum angle, inside that the rays undergo total internal reflecti
operation of Shaded-pole motors
cosider a causal LTI system whose system function is H(z)=1-1/5z^-1/(1-1/2z^-1+1/3z^-2)(1+1/4z^-1) find the direct form 1 and direct form 2
Q. JFET Common Source Amplifier? The common source configuration for a FET is similar to the common emitter bipolar transistor configuration, and is shown in figure. The common
A 20kw 220v shunt generator has armature resistance of 0.07 and a shunt field resisitance 900 ohm find field loss?
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What is a coprocessor? It is a specially designed microprocessor which take care of mathematical calculations including integer and floating point data .it is intended to work
Differentiate between dual beam and dual trace oscilloscope
The spectrum analyser plots amplitude against frequency, in other words it shows signals in the frequency domain. The spectrum analyser has the same trigger options as the oscillos
phase shifter with examples
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