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Electric Circuits

Electric Circuits
The energy stored by a capacitor is given by

 1/2 QV.
 Q2 / 2C.
 all of them.
 1/2 CV2.

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Electric Circuits
Galvanizing is the coating of

 zinc.
 lead.
 chromium.
 brass.

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Electric Circuits
Our household apparatus are connected in

 series.
 cascade.
 series and parallel combination.
 parallel.

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Electric Circuits
How many 200W / 220V bulbs connected in series across 220V supply will consume 100W?

 2.
 1.
 Not possible.
 4.

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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.
 4 Ω.
  40 Ω.
 400 Ω.

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Electric Circuits
Three capacitors each of capacity C are given. The resultant capacity (2/3) C can obtained by using them

 all in series.
 two in parallel and third in series with this combination.
 all in parallel.
 two in series and third in parallel across this combination.

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MORE MCQ ON Electric Circuits

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