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Electric Circuits

Electric Circuits
In the circuit shown below, what is the voltage across 5 Ω resistor?

 None of them
 34.4 V.
 -28.4 V.
 -27.4 V.

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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

 30 mA.
 300 mA.
 3 A.
 100 mA.

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Electric Circuits
Which of following is not a vector?

 Linear momentum.
 Angular momentum.
 Electric potential.
 Electric field.

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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.

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

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Electric Circuits
A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

 1.765 Ω.
 135.86 Ω.
 0.015 Ω.
 63.7 Ω.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 0.25.
  0.5.
  2.
 4.

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