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Electric Circuits

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 KΩ
 1 Ω
 1 MΩ

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Electric Circuits
The plates of lead acid storage battery are most likely to be short circuited if

 too much water is added.
 the electrolyte evaporates.
 the battery charged too slowly.
 sediment collect at the bottom of the battery.

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Electric Circuits
The synchronous speed for the seventh space harmonic mmf wave of 8 pole, 50 Hz induction machine will be

 5250 rpm in forward direction.
 5250 rpm in reverse direction.
 107.14 rpm in forward direction.
 107.14 rpm in reverse direction.

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Electric Circuits
A parallel plate capacitor with air as dielectric, force between plate is F. If capacitor is now immersed water of dielectric εr, force between plate will be –

 F.
 εr/F.
 0.
 F εr.

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Electric Circuits
If conductance increases as temperature increases it is called as ..........

 negative co-efficient.
None of these
 both 1 and 2.
 positive co-efficient.

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Electric Circuits
In which braking back emf exceeds supply voltage?

  Plugging.
  None of these.
  Dynamic.
  Regenerative.

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