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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.).
Q. Draw a 100 line exchange using two motion selectors and elucidate, how switching takes place in it. Ans: In a 100 line exchange, every subscriber is assigned a 2 digit
At the transmitter in a standard AM system, P f = 50 W. In the receiver (S 0 /N 0 ) AM = 250 when (S i /N i ) AM = 3000. Find the transmitter's unmodulated carrier power and t
Q. Consider a series-carry synchronous counter with T flip-flops shown in Figure in which the AND gates carry forward the transitions of the flip-flops, thereby improving the speed
An electric heater element is made of Nichrome wire having resistivity equal to 100 ×10 -8 ohm-metre. The diameter of the wire is 0.3 mm. Calculate the length of the w
Q. Do the following operations with 8 bit bytes, and indicate the condition of the overflow and carry bits. a) 10111011 + 00000011 b) 11101101 + 11111001 c) 11011011 + 110
Voltage divider bias: The voltage divider is made by using external resistors R 1 and R 2 . The voltage beyond than R 2 forward biases the emitter junction. Via prop
Q. What do you mean by Negative Clamper? During the positive half cycle the diode conducts and acts like a short circuit. The capacitor charges to peak value of input voltage V
Explain BOUND instructions in 8086 family with example and their effect on flag. BOUND: The BOUND instruction, that has two operands, compares a register along with two word
Q. A silicon npn BJT is biased by the method shown in Figure, with R E = 240 , R 2 = 3000 , and V CC = 24 V. The operating point corresponds to V BEQ = 0.8V, I BQ = 110 µA,
National tariff policy: The Central Government notified the National Tariff Policy on January 6, 2006, for the power sector in line along with the Section 3 of the EA, 2003. Wi
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