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Q. What is Output Impedance?
Output Impedance : The output impedance of an amplifier is a measure of the impedance or resistance. It has nothing to do with the actual loading that may be placed at the output. For example, an amplifier has an output impedance of 10 Ohms. This is verified by placing a load of 10 Ohms across the output, and the voltage can be seen to decrease by 1/2. However, unless this amplifier is capable of substantial output current, we might have to make this measurement at a very low output voltage indeed, or the amplifier will be unable to drive the load.
Design a suitable double –layer lap winding for a 6-pole dc armature with 18 slots and two coil sides per slot. Give values of front-pitch, brack–pitch and commutator pitch. Draw t
A Capacitor-Fed, Voltage-Step-Down, Single-Phase, Non-Isolated Rectifier
Q. D flip-flop - latch or delay element? The symbol for the clocked D flip-flop is shown in Figure (a), in which the two output terminals Q and ¯ Q behave just as in the SRFF,
Explain the electrical contact materials with examples. Electrical contact materials: A number of elements in their pure form as copper, nickel, palladium, molybdenum, platin
Question : (a)(1) Show different types of voltmeters commonly used. (2) A basic d'Arsonval meter movement with an internal resistance Rm = 100 ?,and a full scale current of
Q. A shift register can be used as a binary (a) divide by-2, and (b) multiply-by-2 counter. Explain. Show a block diagram of a 4-bit shift-right register using JKFFs.
i want to prodused domestic power factor correction like industial
Q. Explain by using a circuit diagram, a ‘Darlington Pair'. Mention its advantages? THE DARLINGTON PAIR : This is a very special way of direct coupling of two transistors. The
Q. What are the Constructional Features of DC Machines? Adc generator ormotormay have asmany as four fieldwindings, depending on the type and size of the machine and the kind o
Three transformers are provided with the following rating values: 1) 2400/240 V, 55kVA, Req1 = (0.1 + 0.0Y) Ohm and Xeq1 = (0.15 + 0.XX) Ohm. 2) 240/120 V, 25kVA, Req1 = (0.1
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