Electric Circuits
The internal resistance of a practical voltage source is considered to be connected in

 parallel.
 either parallel or series.
 series.
None of these

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Electric Circuits
Atoms have no electric charge because they

 have an equal number of electrons and protons.
 have an equal number of neutrons and protons.
 have an equal number of charged and non charged particles.
 have neutrons in their nuclei.

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