Electronic Principles
A real voltage source has

Zero internal resistance
None of these
A large internal resistance
A small internal resistance
Infinite internal resistance

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Capacitive reactance provides the only opposition to current flow
Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
None of these
The ac voltage leads the current by 90 degree

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