According to Ohm's Law, the current flowing through a conductor is directly proportional to the potential difference across its ends, provided the physical conditions of a conducto... According to Ohm's Law, the current flowing through a conductor is directly proportional to the potential difference across its ends, provided the physical conditions of a conductor remain the same. If 'I' is the current flowing through the conductor and 'V' is the potential difference across its ends, then according to Ohm's Law: V = I * R, where R is the resistance of the conductor. The resistance per cm is a constant.
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The text is explaining Ohm's Law, which states that the current flowing through a conductor is directly proportional to the potential difference across its ends, assuming the physical conditions remain constant. It includes equations that represent this relationship.
Answer
Resistance depends on length and resistivity: R = ρ * L.
The resistance of a conductor depends on its length, the material's resistivity, and remains constant at a given temperature and physical conditions.
Answer for screen readers
The resistance of a conductor depends on its length, the material's resistivity, and remains constant at a given temperature and physical conditions.
More Information
Resistance is a property of an object that quantifies how strongly it opposes the flow of electric current, with its value determined by the material and physical dimensions of the conductor.
Tips
Common mistakes include not considering the temperature and physical conditions which can impact resistance.
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