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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

  90 to 98 %.
  70 to 80 %.
  99 %.
  50 to 60 %.

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Electric Circuits
Which of the following can not be connected in series unless they are identical?

 Both of above.
 Voltage source.
 Current source.
 Resistance.

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Electric Circuits
In series RLC circuit which of the following represents the Q factor ?

 XC/R
 VR/V
All of these
 XL/R

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Electric Circuits
Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

 2 Ohm and 2.5 Ohm.
 1.25 Ohm and 3.25 Ohm.
 2.2 Ohm and 2.3 Ohm.
 1.5 Ohm and 3 Ohm.

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Electric Circuits
The resistivity of semi-conductors at room temperatures is

 0.01 to 50 ohm - cm.
 109 to 1012 ohm - cm.
 1.6 × 106 to 100 × 106 ohm - cm.
 1000 to 1500 ohm - cm.

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Electric Circuits
Active materials of a lead acid cell are

 spongy lead.
 lead peroxide.
 all of above.
 dilute H2SO4.

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MORE MCQ ON Electric Circuits

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