power is the product of voltage and current.so we can measure the value of power just by using ammeter and voltmeter.......then why do we use a wattmeter?

5 Answers  

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Why a tesa lamp is glow between two phase?

0 Answers  

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how many types of transformer.

3 Answers   Technocrats,

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what is difference between start imitation and start interlock for 3 phase motor protection ?

2 Answers   OPS,

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What is the difference between the watt hour meter and Var hour meter in terms of internal connection and work theory . ie "When the meter records watt-hour an when the meter records var hours ??"

13 Answers  

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How does MCB operate without relay..?

10 Answers   Toyota,

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how we design a pannel to start 10HP motor with the help of star delta starter?

0 Answers  

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state working of halogen lamp?

0 Answers  

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what is earthing

1 Answers  

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I have experienced electrical maintenance HT ,but I completed be ECE ....can I apply c license or not ???? Pls help me friend s...

0 Answers   Crew pvt ltd,

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In any Industry, Which voltage level either 3.3kV or 6.6KV to be chosen? Then I would like to know ,Is there any cost consideration or Rating of motor?

5 Answers  

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what is meaning of phase angle in two phase.

5 Answers  

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