Electric Circuits
A 3 – φ delta connected symmetrical load consumes P Watts of power from a balanced supply. If the same load is connected in star to the same supply then what is the power consumption?

 √3P.
 3P.
 P.
 P/3.

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Electric Circuits
Pure metal generally have

  low conductivity and zero temperature coefficient.
  high conductivity and low temperature coefficient.
  high conductivity and large temperature coefficient.
  low conductivity and high temperature coefficient.

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Electric Circuits
A certain network consists of large number of ideal linear resistances, one of which is designated as R and two constant ideal source. The power consumed by R is P1 when only the first source is active and P2 when only second source is active. In both sources are active simultaneously then the power consumed by R is

 P1 ± P2 .
 (√P1 ± √P2)2.
 √P1 ± √P2.
 (P1 ± P2 )2.

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