Question

13. a)
State Ohm's law. Mention the factors on which the resistance of a conductor
depend​

Answer 1

Answer:

Ohm's law states that the current through a conductor is proportional to the voltage across the conductor.

The resistance of the conductor depends on the following factors:

The temperature of the conductor

The cross-sectional area of the conductor

Length of the conductor

Nature of the material of the conductor

Answer 2

Ohm's law states that, while keeping the temperature and physical conditions constant the current through a conductor will be directly proportional to the potential difference across that conductor.

Before discussing the factors upon which the resistance of a conductor is dependent, we will be discussing about the resistance itself in brief.

Resistance :

• "It is the property of an electrical conductor due to which, the electrical conductor opposes the flow of electrical current through it."

Now, this resistance is dependent upon several factor, which are :

1. Length of the conductor : Resistance is directly proportional to the length of the conductor.
2. Cross sectional area of the conductor : Resistance is inversely proportional to the cross sectional area of the conductor.
3. Nature of the material of the conductor : This factor is conveyed by the "resistivity" (ρ).
4. Temperature : The resistance of the conductor is also dependent on the temperature of the conductor.

Hence, we have discussed about the Ohm's law and the factors on which the resistance of a conductor is dependent.