When using an ohmmeter to check resistance across an open switch, the reading would be

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Multiple Choice

When using an ohmmeter to check resistance across an open switch, the reading would be

Explanation:
An ohmmeter works by applying a small test voltage and measuring the current to determine resistance. Across an open switch, there’s no completed path for current, so the current is essentially zero. Since resistance is V divided by I, a near-zero current makes the reading very large—effectively infinite. In practice, the meter typically displays something like “OL” or a very large number to indicate an open circuit. So the reading would be infinite resistance.

An ohmmeter works by applying a small test voltage and measuring the current to determine resistance. Across an open switch, there’s no completed path for current, so the current is essentially zero. Since resistance is V divided by I, a near-zero current makes the reading very large—effectively infinite. In practice, the meter typically displays something like “OL” or a very large number to indicate an open circuit. So the reading would be infinite resistance.

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