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Electric Circuits

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

 Voltage.
 Power factor.
 All of above.
 Current.

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Electric Circuits
A p.d. of 300 V is applied across series combination of 3 μF and 9 μF capacitors. The charge on each capacitor is ___________________ μC.

 240.
 7.5.
 675.
 3600.

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Electric Circuits
If one cycle of AC waveform occurs every millisecond, the frequency will be

 10 kHz.
 100 Hz.
 50 Hz.
 1000 Hz.

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Electric Circuits
Super mesh analysis is used in case of

 both.
 ideal voltage source is connected between two non reference nodes.
 current source branch is common for two meshes.
 either 1 or 2.

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Electric Circuits
Which of the following carbon coded resistor has value of 10k ohm with 20% tolerance?

 Yellow, violet, yellow and silver stripes.
 Red, red, green and silver stripes.
 Orange, orange, black and gold stripes.
 Brown, black, orange and no tolerance band.

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Electric Circuits
Common impurity in battery electrolyte is

 lead sulfate.
 sodium chloride.
 dust.
 iron.

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