Ohm S Law

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: 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.

Ohm's law states that the current passing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor. This law is applicable to materials that have a linear relationship between current and voltage, such as metallic conductors, where the resistance remains constant with respect to changes in voltage. For gaseous conductors, semiconductors, and light emitting diodes (LEDs), the relationship between current and voltage is non-linear, so Ohm's law does not apply in the same manner.

The correct option is (C): metallic conductors

The relationship between current and voltage is established by Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points. This relationship is attributed to the scientist Georg Ohm.

Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, provided the temperature and other physical conditions remain constant.

This law is applicable to metallic conductors under constant physical conditions.
Semiconductors do not strictly obey Ohm's law due to their non-linear behavior.

Therefore, only statement (b) is true.