Question:

Internal resistance of an ideal voltage source is:

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An ideal voltage source delivers constant voltage with zero internal resistance. Ideal current source has infinite internal resistance.
Updated On: July 22, 2025
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The Correct Option is A

Solution and Explanation

An ideal voltage source is a theoretical concept used to simplify circuit analysis. It is defined by having two main characteristics: it maintains a constant voltage regardless of the current drawn from it, and it has an internal resistance of zero. This means that the output voltage of the ideal voltage source does not drop, even when supplying current to a load. Since internal resistance limits the current flow and causes a voltage drop within real-world sources, an ideal voltage source must have an internal resistance of:
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