Un-Answered Questions { Electrical Engineering }

What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?

1632


For small size, high frequency coils, the most common core material is- a. )Air b. )Ferrite c.) Powdered ion d.) Steel

2525


can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

1500


For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?

1597


At full load wat is the motor p.f And at no load will is the motor p.f?

1723


HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory

1430


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.

2782


sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

1382


Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

2241


Hello sir i m student of gtu .what is idp.

1755


what is doid

2312


Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?

2348


How it can worked plc based electrical system And which type of software using.

1678


what happen when power factor of 2 parallely operated transformer become equle?

1717


How can we calculate the efficiency of a Running (On-Load) Motor ? What parameters are required and what is the method ?

1534