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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.
design a combinational ckt ,which detect whatever a no.(in binary) is divisable by 3 or 4
limits of collector to base biasing
AC Operation of an iron core Hence, if a wattmeter were used to measure the power delivered over a full period of the waveform (which will also b
Hard magnetic materials are used for making (A) Permanent magnets. (C) Conductors. (B) Insulator. (D)Temporary magnets. Ans: Hard magnetic materials are
Q. A 25-kVA, 2300:230-V, 60-Hz, single-phase transformer has the following parameters: resistance of high-voltage winding 1.5 , resistance of low-voltage winding 0.015 , leakage
Q. Find the output voltage in terms of the input voltage? In order to illustrate the insensitivity of feedback circuits to variations of the op-amp parameters, let us consider
explane the special features of dual beam?
Draw an electrical relay diagram rung showing a N/O contact of CR1(coil) in series witha N/C contact of CR2(Coil), operating a lamp L1. A delay-on (TON) relay has a preset of 5.
Positive Clippers The shunt connected positive clipper, in which the diode conducts for positive half cycle and hence, the output is a straight line. During the negative half c
Q. Explain Charge-to-Charge Amplifier A circuit is shown in Figure in which there is a capacitor C1 in the - input line and a capacitor Cf in the feedback loop. KCL at node X g
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