Power Systems
Direct conversion of heat energy into electrical energy is possible through

 Fuel or solar cell.
 Thermal converters.
 Both A and C.
 MHD generator.

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Power Systems
Per unit of any quantity is defined as

 actual value of quantity /base value of quantity in different units
 actual value of quantity /base value of quantity in same units
 base value of quantity /actual value of quantity in same units
 base value of quantity /actual value of quantity in different units

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