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Q. A signal with bandwidth of 100 MHz is to be transmitted 40 km by LOS radio transmission. Taking B/fc = 1/30, and using a circular-aperture parabolic dish with 50-cm radius at ea
Explain Thermoplastic materials. Thermoplastic materials: The properties of such plastic materials do not change considerably when they are melted and after that cooled and s
Q. Write a short note on heat sink For transistors handling small signals ,the power dissipated at the collector is small.Such transistors have little chances of thermal runawa
Athree-phase, wye-connected, round-rotor, 220- V, 60-Hz, synchronous motor, having a synchronous reactance of 1.27 per phase and negligible armature resistance, is connected in p
Q. A 100-kVA, 2300:230-V, 60-Hz, single-phase transformer has the following parameters: R 1 = 0.30 , R 2 = 0.003 , RC 1 = 4.5k, X 1 = 0.65 , X 2 = 0.0065 , and Xm 1 = 1.
Give some applications of constantan. Constantan is an alloy of nickel and copper. It is used in thermocouples, motor starters and precision resistors.
Q. What is Induction machines? We shall first consider polyphase induction motors and then single-phase induction motors. The polyphase induction motors used in industrial appl
how we can say that 3 phase induction motor is short curcited practically?
Q. Two 1150:115-V transformers are to be inter connected for (a) 2300:230-V operation, and (b) 1150:230-V operation. Show the interconnections and appropriate polarity markings.
define
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