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Explain Synchronous Generators?
They can be utilized to produce or absorb reactive power. An over-excited machine produces reactive power when an under-excited machine absorbs it. The generator is the major source of supply to the system of both of the positive and negative VArs. The ability to supply VArs is ascertained by the short-circuit ratio (1/ synchronous reactance).
For economic reasons, in current units this ratio is kept low and therefore the inherent ability to run at leading power factors is not large. For instance, a 200 MW, 0.85 p.f. machine with a 10% stability margin can just supply 45 MVAr at full power outputs.
Q. The quantum levels of a quantizer are separated by the step size δv = 0.2 V, with the lowest and highest levels of-3.3 V and +3.3 V, respectively. A sequence ofmessage sample
How to Make LPG Safer in the Laboratory The following must be observed in the laboratory: 1. The LPG cylinders should be kept outside the laboratory in a ventilated room.
Q. What the voltage gains in the FET amplifier? For common source Voltage gain=V o /V i = - µRd / Rd + rd where µ is the amplification factor,Rd the drain resistance a
One byte Instructions One byte instruction include both the opcode operand in the same byte. To identify one byte instruction one must observe followings things .
SBI Subtract Immediate with Borrow Instruction This instruction is used to subtract 8 bit data and borrow from the accumulator. The result of the operation is stored
Q. Explain Resistance-capacitance coupling? It is the most commonly used coupling in discrete device amplifier as it is least expensive and has satisfactory frequency response.
#What are the types of Negative Feedback Amplifier?
Q. Explain Machine-tool process to drill or punch holes? Figure depicts an elementary system, including the input, digital processor, drill-positioning mechanism, and sampled-d
Explain multimeter A multimeter, or universal instrument, may be used to measure voltage, current and resistance.
Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC. (B) bakelite. (C) Polyester. (D)
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