Economics of Power Generation
Maximum demand tariff is generally not applied to domestic consumers because

They consume less power
Their load factor is low
None of the listed here
Their maximum demand is low

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Economics of Power Generation
Annual depreciation as per straight line method, is calculated by

increasing a uniform sum of money per annum at stipulated rate of interest
the capital cost minus the salvage value, is divided by the number of years of life
None of these
the capital cost divided by number of year of life

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