how to calculate no. of earthing pits and their diamensions?
no. of lightning arrester rods which are required to
protect a building of 35 mtr and we calculate?
Answer Posted / anand
it is depends on what extent you need the safety level.
| Is This Answer Correct ? | 0 Yes | 2 No |
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An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to 2600 customers as follows. a) 200 medium size businesses; each needs 16 addresses b) 400 small businesses; each needs 8 addresses c) 2000 households; each needs 4 addresses Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.
how much allowable resistance that can be difference in motor all coils?
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
What are the raitings of Mcb,mccb and Acb in detail ??
what is the need to express current and voltage in rms value? rms value is also called as effective value,what is effective value?
what are the standard IR values should be of R-E, Y-E, B-E, R-Y, Y-B, B-R of VCB in closed condition and in open condition for 500KVA & 1000KVA transformers. and what is the acceptable range when tested by 5000V megger.
What are the properties of a resistor?
difference between the applicability of nortons and thevenin theorem
Q: How to calculate Transformer losses , tell us by Formula.
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What are the types of excitation system?
how can i get an electrical c-certificate?
what is the difference b/w ATS and HTS?
why in the three pin plug all 3 pins are cutted ?
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.