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What is 20 kW power?
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A 500kVA distribution transformer having copper and iron losses of 5kW and 3kW respectively on full load. The transformer is loaded as shown below: Loading (kW) Power Factor (Lag) No. of hours 400 0.8 06 300 0.75 12 100 0.8 03 No load - 03 Calculate the all-day efficiency.

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The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency

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

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What are the 20 forms of energy?
Answer : Energy comes in many different forms, and these are often categorized in various ways depending on how they're used or how they behave. Here are 20 different forms of energy: 1. **Mechanical Energy**: ... . These are just a few of the many forms of energy we encounter in the world around us!...

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A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each ... lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

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What is the difference between a kilowatt (kW) and a kilowatt-hour (kWh)?

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Why motor are rated as KW while transformer rated in kVA?

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Is kVA equal to kW?
Answer : No, **kVA** (kilovolt-amperes) is **not** the same as **kW** (kilowatts). They both measure power, but in different ways. - **kVA** measures **apparent power**, which is the total power supplied by a source. It ... } \times 0.8 = 8 \, \text{kW} \] So, in this case, 10 kVA is equivalent to 8 kW....

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How many kW is 10 kVA?
Answer : To convert from kVA (kilovolt-amperes) to kW (kilowatts), you need to know the power factor (pf) of the system. The formula is: \[ \text{kW} = \text{kVA} \times \text{Power Factor (pf)} \] ... on the power factor of the load. If you know the power factor, you can use it in the formula above....

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A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.

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