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Electric Circuits

Electric Circuits
Which of the following is not a bilateral element?

 Resistor.
 Capacitor.
 Inductor.
 Diode.

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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

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

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Electric Circuits
Which quantity consists of a unit 1KWh ?

 Energy
 Time
 Power
 Charge

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

 All of above.
 Current.
 Power factor.
 Voltage.

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Electric Circuits
A series RLC circuit is connected across a 240V, 50 Hz supply. When the voltage across capacitor is 250V, a maximum current of 0.5A flows in the circuit. Find the resistance.

 1000 Ohms.
 480 Ohms.
 500 Ohms.
 100 Ohms.

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

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

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