c ka base kya hota hai? what is communication?

5242

Explain conductivity, resistivity and resistance?

1032

where reactive power is used

2057

T union support factor

1889

How can i Check at site this material is Powder coated CRCA ?

1747

What is screen analysis and what are its applications in the chemical industry?

1210

defination of radial vibration?

2274

Explain the operation carried out in thermal power stations?

1046

1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

2042

Which one is more efficient in terms of required memory space call-by-value or call-by-referance?

1908

how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???

2408

What is the microstructure content of D25-8 nodular cast iron?

2631

how to select electronic timer(Star-Delta) setting for diff. rating motors

1957

How to calculate Cement in bags ,sand in sqft and aggregate in sqft for 1cum M25 grade concrete

1763

What are the differences between combinational circuits and sequential circuits?

1073