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Q. Explain Telephone hand set and it’s working ?
A standard telephone set is comprised of a transmitter, a receiver and electrical network for equalization, associated circuitry to control side tone levels and to regulate signal power, and necessary signalling circuitry. Essentially a telephone setis an apparatus which creates an exact likeness of sound waves with an electric current. Figure demonstrates functional block diagram of a telephone set. Essential components of a telephone set are ringer circuit, on/off hook circuit, equalizer circuit, hybrid circuit, speaker, microphone and a dialling circuit.
Q. Explain braking mode of rotating machines? The braking mode has both mechanical and electric energy input. The total input is dissipated as heat. The machine is driven by th
What are the signals involved in memory bank selection in 8086 microprocessor? The 8086 based system will have two sets of memory IC's. One set for even bank and another for od
Explain the Basic concepts in memory interfacing The primary function of memory interfacing is that the microprocessor should be able to read from and write into a given regist
see figure on this link: http://tinypic.com/r/1zodevk/8. A. j400 I1-j1200 I2 (A) B. -j400 I1+j1600 I2 (A) C. j400 I1+j400 I2 (A) D. -j400 I1-j400 I2 (A)
Q. The response v(t) of a linear system to a unit-step excitation i(t) is given by v(t) = (5 - 3e -t + 2e -2t ) u(t). Determine the transfer function H(s) = V (s)/I (s).
A zener regulator consumes a zener diode with an internal zener resistance of 5 ohm and the value of resistance in the regulator circuit is 82 ohm. If the supply voltage alters by
time period measurement
a) State the principle of working of transformer. b) A 230/110 V, single-phase transformer takes an input of 350 volt-amperes at no load while working at rated voltage. The core
how to wire a three phase contactor to become a single phase contactor?
QUESTION: Electromagnetic Fields and Waves (a) Illustrate with help of diagrams the Cartesian, Cylindrical and Spherical coordinate systems. (b) Lay down the assumptions fo
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