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Electric Circuits

Electric Circuits
Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

 3.12.
 1.56.
 6.24.
 0.020.

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Electric Circuits
Capacitors for P.f correction are rated in

 KV.
 KVAR.
 KVA.
 KW.

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Electric Circuits
Active materials of a lead acid cell are

 lead peroxide.
 spongy lead.
 dilute H2SO4.
 all of above.

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Electric Circuits
A balanced 3 - φ star connected load is fed from a 208 V, 3 - φ supply. Each load has resistance of 35 Ω. The total power is

 411.3 W.
 618 W.
 none of these.
 1236 W.

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Electric Circuits
Advantage of active filter is

  derive high impedance load.
  both of above.
  easy to tune.
  do not offer gain.

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Electric Circuits
In RLC series circuit, at resonance condition the value of current is

 Minimum
None of these
 Maximum
 Zero

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