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Electric Circuits

Electric Circuits
Air gap flux density is of the order of

 0.75 - 0.8 T.
  0.65 - 0.9 T.
  0.35 - 0.5 T.
 0.85 - 0.9 T.

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Electric Circuits
In a series resonance circuit if bandwidth is 1 MHz and inductance is 1 mH, then what is the resistance value?

 100 Ω
 1 MΩ
 1 Ω
 1 KΩ

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Electric Circuits
If the practical units of voltage and current wave each made 20 times as large as they are at present, what would be the consequent alternation in the size of the unit of capacitance?

 60 times.
 Nil.
 200 times.
 20 times.

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Electric Circuits
Electrics supply for electroplating should be

 any of above.
 low AC voltage.
 low frequency ac voltage.
 DC voltage.

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the value of C?

 10.54 µF.
 8.51 µF.
 1.8 µF.
 4.78 µF.

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Electric Circuits
If C be the capacitance, V be the potential difference and I be the current, then I / CV will have the unit of

 power.
 reactive power.
 time.
 frequency.

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