how are reversing the direction of dc motor

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What is Vk and Imag i.e Knee point voltage & Magnetising Current? How to calculate above values? How to define accuracy class 5P10?

7 Answers   Deccan Cements, Doosan, Torrent Power, Transco,

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What are thermo couple cables and where they are used.

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In D O l starter motor starts as a star connected ,then in star delta starter also motor initially starts as star how come star delta is preferred from dol

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Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.

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How i can identify the 220V and 110V power supply equipment? No tag number.

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What is the breakdown voltage?

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why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

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What is a copper loss or i2r loss pc?

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why induction motor speed is decress with increase in load? how synchronous motor speed is constant?

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how to calculate P.F from kva only?

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cleat wiring system is used at

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