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Electric Circuits

Electric Circuits
In Cauer 1st form last element in the network is

  Cshunt.
  Lshunt.
  Lseries.
  Cseries.

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Electric Circuits
Which variety of copper has the best mechanical strength ?

  Annealed copper.
  Hard drawn copper.
  Soft copper.
  Cast copper.

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Electric Circuits
The resistance of a strip of copper of rectangular cross section is 2 Ω. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be

 3 / 4 Ω.
 6 Ω.
 4 / 3 Ω.
 3 / 2 Ω.

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the current in the circuit?

 0.1465 A.
 0.1578 A.
 0.2547 A.
 0.4583 A.

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Electric Circuits
A variable capacitance is one whose capacitance

 changes with temperature.
 can be changed manually or by mechanical force.
 changes with voltage.
 changes with time.

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Electric Circuits
If a resistor and an inductor are connected in series across a voltage source. Which two parameters in that circuit decrease if frequency of voltage source increases?

 VL and Z.
 VL and VR.
 Z and I.
 VR and I.

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