Power Systems
Aluminium is now most commonly employed conductor material in transmission lines than copper because

 costlier
 it is cheaper and lighter
 it is more conductive
 its tensile strength is more

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Power Systems
The modern trend in electric power generation

  none of above.
 to have large number of small size thermal plants located at different places.
 to have large size thermal plants near load centre.
 to have large size thermal plant located near coal fields.

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Power Systems
Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

 if both 2 and 3 are satisfied
 always
 if the shunt admittances at the buses are ignored
 if the mutual couplings between transmission lines are absent

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