Question:
Which of the following materials obeys the Ohm's law?
Which of the following materials obeys the Ohm's law?
Updated On: Apr 5, 2025
- Light emitting diode
- Silicon
- Aluminium
- Germanium
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The Correct Option is C
Solution and Explanation
Correct answer: Aluminium
Explanation:
Ohm's law states that the current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant: \[ V = IR \] Materials that obey Ohm's law are called ohmic conductors. Metals, such as aluminium, are good conductors and follow Ohm’s law over a wide range of voltages and temperatures.
Other options:
- Light Emitting Diode (LED): a non-ohmic device; current does not vary linearly with voltage.
- Silicon and Germanium: semiconductors; their current-voltage relationship is nonlinear.
Hence, the correct answer is: Aluminium.
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