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Is Ohm's law applicable when a bulb is turned on?

Correct answer: B. No

  • A. Yes
  • B. No
  • C. Partly
  • D. None of these options are correct

Explanation

Those materials for which the slope of the I versus V graph is not constant are called non-ohmic materials.For EXAMPLE The filament of an electric bulb.The I-V graph for non-ohmic materials is non-linear (curved).Ohmic materials have constant resistance. When a bulb is turned on, it heats up, and its resistance increases.Therefore, Ohm's law is not applicable when a bulb is turned on.Hence, B is the correct option.

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About Current Electricity

Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.

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