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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 Voltage.
 All of above.
 Power factor.
 Current.

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Electric Circuits
You have to replace 1500 Ω resistor in radio. You have no 1500 Ω resistor but have several 1000 Ω ones which you would connect

 two in parallel.
 three in series.
 two in parallel and one in series.
 three in parallel.

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Electric Circuits
Three resistances have the following ratings 150 Ω at 5 %, 100 Ω at 5 % and 200 Ω at 5 % respectively. The percentage error when all the three are connected in series will be

 + 7 %.
  + 6 %.
  + 5 %.
 + 8 %.

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Electric Circuits
1 F is theoretically equal to

 ratio of 1 V to 1 C
 ratio of 1 C to 1 V
 none of these
 1 ohm of resistance

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Electric Circuits
A constant current source supplies a electric current of 300 mA to a load of 1 KΩ. When the load changed to 100 Ω, the load current will be

 100 mA.
 3 A.
 300 mA.
 30 mA.

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Electric Circuits
Internal resistance of ideal current source is

 finite
 zero
 infinite
 100 ohms

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MORE MCQ ON Electric Circuits

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