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Electric Circuits

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

 Current.
 Power factor.
 All of above.
 Voltage.

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Electric Circuits
An ac voltage source v = vo sinωt is connected across a parallel plate capacitor C. If the conductor current is ic and the displacement current is id, then which is true among following relation

 ic = id.
 ic < id.
 ic + id = 0.
 ic > id.

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Electric Circuits
According to duality principle a series inductor (L) can be represented as

 Parallel C.
 Parallel L.
 Series L.
 Series C.

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Electric Circuits
Power dissipation in ideal inductor is

 Minimum
 Maximum
 Zero
 A finite value

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Electric Circuits
If a resistor and a capacitor are connected to form series R - C circuit across a voltage source. If frequency of voltage source increases

 the current decreases.
 the current decreases abruptly.
 the current increases.
 the current remain unaltered.

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Electric Circuits
A ceramic and a mica capacitor have the same physical dimension. Which has the higher value of capacitance?

 Ceramic capacitor.
  It is impossible to conclude on the basis of information supplied.
 Mica capacitor.
 Both have identical value of capacitor.

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