Q2. A static electric device works at 240 V uses a current of 0.64 A connected to a 20 V,70 W computer identify the static electric machine and evaluate the preferable current used by the computer. If we want to increase the load power to 80W, how much source current is required. Is this device works in dc? Justify.
Q2. A static electric device works at 240 V uses a current of 0.64 A connected to a 20 V,70 W computer
identify the static electric machine and evaluate the preferable current used by the computer. If we want
to increase the load power to 80W, how much source current is required. Is this device works in dc?
Justify.
The static device is converting the high voltage into a low voltage. Therefore it can be a step-down transformer. The transformer is a static device. Because they don't have any moving parts i.e., the coils are stationary since they are wounded to an iron core. So a transformer consists of a primary and secondary coil.
Given the power of the computer, 70 W.
Therefore the current used by computer be calculated as,
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