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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.
Trivector Meter A trivector meter is designed to record active, reactive and apparent energy along with MD indicators on all. The trivector meter is a compact unit. It exchan
Static V- I Characteristics A thyristor works in three basic modes a.Reverse blocking mode b.Forwards blocking mode and c.Forward conducting mode In revers
Q. A60-Hz, three-phase transmission line has a total per-phase series impedance of 35+j140 .Ifit delivers 40 MW at 220 kV and 0.9 power factor lagging, find: (a) The voltage, c
Q For a three-phase, fully controlled, recti?er-fed, separately excited dc motor, corresponding to ideal no-load operation, find the expression for the no-load speeds. Comment on w
determine the efficience of a 16 KVA transformer for the full-load,unit power factor
Question: General EMC Knowledge (a) Give 2 reasons for the augmentation of electromagnetic radiation in urban regions. (b) Pointe aux Diable bears its name due to the a
Q. Explain Current and Magnetic Force? The rate ofmovement of net positive charge per unit of time through a cross section of a conductor is known as current, i(t) = dq / dt
Q. Explain about Differentiator? Shown in Figure is a differentiator which is obtained by replacing R1 in the inverting amplifier of Figure by a capacitor C. Assuming ideal op-
The various flags are: - Sign flag, Axillary flag, Zero flag, Parity flag, Carry flag.
Q. What are the necessary conditions to maintain sustained oscillation? The use of positive feedback that results in a feedback amplifier having closed-loop gain |Af| greater t
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