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Electric Circuits

Electric Circuits
A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is

 500 ohms.
 50 ohms.
 5000 ohms.
 1000 ohms.

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Electric Circuits
Final value theorem is not applicable for which of the following?

 Both 2 and 3
 marginally stable systems
 stable systems
 unstable systems

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Electric Circuits
Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

 3 Ω and 9 Ω.
  3 Ω and 6 Ω.
  1.5 Ω and 3 Ω.
 6 Ω and 9 Ω.

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Electric Circuits
Advantage of active filter is

  easy to tune.
  derive high impedance load.
  both of above.
  do not offer gain.

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Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.4.
 0.9.
 0.6.
 0.85.

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Electric Circuits
Power dissipation in ideal inductor is

 Zero
 Minimum
 A finite value
 Maximum

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