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Electric Circuits

Electric Circuits
The lead acid cell should not never be discharged beyond

 1.9 V.
 2 V.
 2.1 V
 1.8 V.

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Electric Circuits
Reciprocity condition for h parameters is

 h12 = h21.
 h12 = - h21.
 h11h22 - h21h12 = 0.
 h12 = h21.

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Electric Circuits
Magnetic flux has the unit of

 Ampere turn
 Newton
 Weber
  Tesla

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Coil.
 Air gap.
 Inductance.
 Core.

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Electric Circuits
The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be

 800 Ω.
 400 Ω.
  40 Ω.
 4 Ω.

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Electric Circuits
Common impurity in battery electrolyte is

 dust.
 sodium chloride.
 lead sulfate.
 iron.

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