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Electric Circuits

Electric Circuits
In the circuit given, I = 1 A for Is = 0. What is the value of I for Is = 2 A ?

 3 A.
 4 A.
  2 A.
 1 A.

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Electric Circuits
Three parallel resistive branches are connected across a DC supply. The ratio of the branch resistances are given as R1:R2:R3 :: 2:4:6. The ratio of the branch currents is

 6:4:2.
 6:3:2.
 2:3:6.
 2:4:6.

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Electric Circuits
Current locus is obtained by which of the following?

 Either of these
 Varying source frequency
None of these
 Varying any one of the circuit element

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Electric Circuits
In which braking back emf exceeds supply voltage?

  Plugging.
  Dynamic.
  None of these.
  Regenerative.

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Electric Circuits
If conductance increases as temperature increases it is called as ..........

 negative co-efficient.
 both 1 and 2.
 positive co-efficient.
None of these

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Electric Circuits
The resistivity of the conductor depends on

 type of material.
 none of these.
 area of the conductor.
 length of the conductor.

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