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Electric Circuits

Electric Circuits
Galvanizing is the coating of

 brass.
 chromium.
 lead.
 zinc.

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Electric Circuits
Image impedance can be written by using short circuit impedance(Zsc)and open circuit impedance(Zoc) as

  (Zsc . Zoc)½
 Zsc+Zoc
 Zsc/Zoc
 Zsc-Zoc

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Electric Circuits
The resistance of 100 W, 200 V lamp is

 200 Ω.
 800 Ω.
 400 Ω.
 1600 Ω.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 0.25.
 4.
  2.
  0.5.

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Electric Circuits
Three identical inductors are connected in delta with a 220 V, 50 Hz, 3 - φ, supply. If the phase current is 24 A, then what is the value of each of the inductance?

 0.049 H.
 0.029.
 None of these.
 0.058 H.

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the plate will get short circuited.
 the capacitor will get heated up due to eddy currents.
 the capacitor can store infinite charge.
 the capacitance value of the plate will decrease.

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MORE MCQ ON Electric Circuits

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