The potential difference, V, across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is known as:

Correct option is A

Correct option: (a),  Ohm's law

The statement describes Ohm's Law.

Ohm's Law states that the potential difference VVV across the ends of a metallic wire (or any conductor) is directly proportional to the current III flowing through it, provided the temperature remains constant. Mathematically,

it is expressed as:

$$V = I \times R$$ 

• ​V is the potential difference (voltage) across the wire,
  
• I is the current flowing through the wire,
  
• R is the resistance of the wire.
  

​This law holds true as long as the temperature of the wire remains constant because the resistance of the wire can change with temperature.

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