In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

1706

What is the mechanical advantage of a double pulley?

649

Explain what types of metals are typically removed via chemical precipitation?

535

if i used salt as a add mixture in concrete, then what will happen and what are the naturally available add mixtures.

1585

How much area will be covered in 1 litre of Velvet touch paint in normal wall condition

955

Is it true that in the 3 phase transformer, the limbs of the core are at 45 dgrees to each other. if true, why?

1590

can anyone tell me can the electromagnetic waves can be reflected back?if so how &by which material it can be reflected back?please tell me so that it can help to my wireless power trasnmission device.

1365

Hello seniors m an engineering student in 3rd yr..i want to know what are the software course in electrical field?i wanted to do certification course but i dont know much about the course?..Regards

1660

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.

1488

which capacity of RCCB used for five thousand watt electricity load?

1358

Define the term latent heat.

664

1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

2385

what is a tetrode transisitor ? show the structure of such a device and indicate the polarity of the biasing voltage applied to each element?

1425

what should be the material composition of transformet oil filtration machine to avoid metal contamination in filteredoil.

1546

What frequency bands are used in satellite communication?

644