Electric Circuits
If two point charges are denoted by + Q and - Q and distance between this charges is d, then the dipole moment P equal to

  Q / d2.
  Q2 × d.
  Q × d.
  Q2 / d.

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Electric Circuits
Two electric bulbs have transparent filament of same thickness. It one of them gives 60 W and other gives 100 W, then-

 60 W lamp filament has shorter length.
 60 W and 100 W lamp filament have equal length.
 100 W lamp filament has longer length.
 60 W lamp filament has longer length.

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Electric Circuits
What is called the instantaneous value of an alternating current?

 The value of peak quantity at any instant.
 The value of peak current at any instant.
 The value of alternating frequency at any instant.
 The value of alternating quantity at any instant.

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