If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
Correct answer: A. Kelvin's law
- A. Kelvin's law
- B. Ohm's law
- C. Kirchhoffs law
- D. Faraday's law
- E. none of the above
Explanation
Kelvin's law states that the most economical conductor size occurs when annual capital charges due to interest and depreciation equal the annual cost of energy loss in the conductor. This balances the cost of a larger conductor against reduced losses.
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