A transformer is used to light a 24volts,70watts lamp from a 240a.c main.The current in the main cable is 0.35A. Calculate, (1) The efficiency of the transformer. (2) the current in the lamp.

1 Answers  

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What is AMF Panel????

3 Answers   Emerson,

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How frequency meter measuring frequency? What is the principle of frequency meter?

2 Answers  

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Explain the function and difference of Restricted earth fault, simple earth fault and sensitive earth fault with connection diagram.

0 Answers   ABB,

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will the power consumption remains the same when speed of the fan cnanges??if so y??

2 Answers  

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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what are safety seals in HT line?

2 Answers  

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why voltage coil in wattmeter called as pressure coil why the pressure term is used in wattmeter?

1 Answers   NPCIL,

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how much distance is required for earth pit to earth pit in substation???

3 Answers   Divis Laboratories,

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If there is 25 hp motor,which type of starters we can us? why?

7 Answers  

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HAT IS THE EFFECT OF LOW POWER FACTOR ON THE GENERATING STATION?HOW WILL YOU IMPROVE THE LOW POWER FACTOR?

1 Answers  

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what is the Transformer Impedence?How can calculate?

0 Answers  

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