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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. What are the various types of amplifiers? Amplifiers can be classified as follows: (a) Based on the transistor configuration 1. Common emitter amplifier 2. Common c
Hard magnetic materials are used for making (A) Permanent magnets. (C) Conductors. (B) Insulator. (D)Temporary magnets. Ans: Hard magnetic materials are
Q. Explain Sampling and Pulse Modulation? In most analog circuits, signals are processed in their entirety. However, in many modern electric systems, especially those that conv
please explain phasor diagram and equivalent circuit
Software Defined Radio (SDR) is an advanced radio technology in which flexibility is achieved in using radio functions such as modulation and demodulation of radio signals are carr
Explain RS422A standard. RS422A: 1. Date Rate: 10 Mbits per second 2. Driving capability up to 4000ft and 10 receivers 3. This is Differential standard that is- a
WHAT IS X AND O
Why maximum power output is given by a machine at an efficiency of 50 percent?
Explain the Power Transmission Lines Transmission and distribution of electric power is accomplished by using overhead lines or underground cables. Overhead lines are normally
1 diagram basic layout of a simple transformer
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