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Question
Which of the following is an ohmic resistance?
Options
Diode valve
Filament of a bulb
Carbon arc light
Manganin wire
MCQ
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Solution
Manganin wire
Explanation:
Manganin is an alloy whose resistance remains practically constant, so it obeys Ohm's law. A diode, a bulb filament and a carbon arc are non-ohmic resistors.
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