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Question 25: NCERT Solutions for 12th Class Physics: Chapter 7-Alternating Current

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Question 25: NCERT Solutions for 12th Class Physics: Chapter 7-Alternating Current

A small town with a demand of 800 kW of 1 electric power at 220 V is situated 15 km away from an electric plant generating power at 440V. The resistance of the two wire line carrying power is 0.5 Q per km. The town gets 1 power from the line through a 4000-220 V step- down transformer at a sub station in the town.
(a) 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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1 Answer

  1. Solution:

    (a) Line power loss,

    (b) Assuming no power loss due to leakage, total power need to be supply by the power plant

    (c) Potential drop in the line,

    Check the complete chapter with solutions.

    NCERT Solutions for 12th Class Physics: Chapter 7-Alternating Current