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Electric Circuits

Electric Circuits
Which cell has the reversible chemical reaction?

 Silver oxide.
 Mercury oxide.
 Carbon Zinc.
 Lead acid.

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  R / n2.
  n2R.
  n2 / R.
  nR .

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Electric Circuits
Three resistances of two ohms each are connected in star. In the equivalent delta representation each resistance will have a value of _______________ Ω.

 5.2.
 0.6.
 6.
 3.4.

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Electric Circuits
The maximum current rating for a 10 k Ω, 0.5 W resistor is

 14.14 mA.
 28.28 mA.
 7.07 mA.
 0.707 mA.

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Electric Circuits
For occurrence of resonance which of the following elements are required?

 L
 C
 R
 Both 2 and 3

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Electric Circuits
Active element of electrical circuit is

 voltage source.
 none of above.
 current source.
 both of them.

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MORE MCQ ON Electric Circuits

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