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(a) Draw the diagram of a device which i...

(a) Draw the diagram of a device which is used to decrease high S voltage into a AC voltage and state its working principle. Write four sources of energy loss in this device.
(b) A small town with a demand of 1200 kW of electric power at 220 V is situated 20 Km away from an electric plant generating power at 440V. The resistance of the two wire line carrying power is `0.5 Omega` per km. The town gets the power from the line through a 4000-220 V step-down transformer at s sub-station in the town. Estimate the line power loss in the from of heat.

Text Solution

AI Generated Solution

### Solution: **(a)** 1. **Diagram of a Step-Down Transformer:** - Draw a rectangular box to represent the transformer. - On the left side, label it as "Primary Coil" and draw a coil with input voltage labeled as "High AC Voltage (e.g., 440V)". - On the right side, label it as "Secondary Coil" and draw a coil with output voltage labeled as "Low AC Voltage (e.g., 220V)". ...
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A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two line wires carrying power is 0.5 Omega per km. The town gets power from the lines through a 4000-220 V step down transformer at a substation in the town. Estimate the line power loss in the form of heat. (b) How much power must the plant supply. assuming there is negligible power loss due to leakage? (c) Characterize the step up transformer at the plant.

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