Why most of analog o/p devices having o/p range 4 to 20 mA and not 0 to 20 mA ?

2 Answers  

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what is the difference b/w low voltage motors & medium voltage motors

1 Answers  

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does buccholz in a transformer use batteries

2 Answers  

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1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

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What happened ,If 3 phase clearance not maintained in 33KV Line,11KV LIne etc?

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How to design the NGR Resistance

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pls,send the previous year written test questions.

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any idea abt REVERSE METERING concept.........?

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what is the necessity of neutral in 3 phase system?

5 Answers  

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In 11/0.414 KV Parralel supply network with Bus tie closed what will be the fault level is it doubled or halved??

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why earth hole size is biggest in plug point?

13 Answers   RRB,

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what is purpose of using reactor in substations

4 Answers   NCC,

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