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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Dynamic.
  None of these.
  Plugging.
  Regenerative.

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Electric Circuits
In an AC circuit, containing pure inductance, the voltage applied is 120 V, 50 Hz while the current is 10 A. Find the value of inductance.

 38 mH.
 34 mH.
 30 mH.
 35 mH.

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Electric Circuits
Three resistances have the following ratings 150 Ω at 5 %, 100 Ω at 5 % and 200 Ω at 5 % respectively. The percentage error when all the three are connected in series will be

 + 7 %.
  + 6 %.
 + 8 %.
  + 5 %.

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Electric Circuits
Among the options which metal has the highest electrical conductivity?

 Stranded aluminium.
 Copper.
 Aluminium.
 Steel.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Inductance.
 Air gap.
 Coil.
 Core.

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Electric Circuits
In the cauer-1 form of LC network---------is series element and --------is shunt element respectively?

 L and C
 C and L
 C and C
 L and L

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