What would be the effect on the resistance of a metal wire of a) increasing it's length. b) increasing it's diameter
Answers
Answer:
a) The resistance will increase
b)The resistance will decrease
Explanation:
a)This is because if the length of the wire is increased, more and more ions will bump against each other causing an increase in the resistance.
b)If the diameter of the wire is increased, there will be more area available for the ions to move and they will scarcely bump against each other.
Answer:
Explanation:
(a) From the above equation, it is clear that resistance is directly proportional to the length. So, if the length is increased the resistance of the metal wire will increase too.
(b) When you increase the diameter of the metal wire, the area of cross-section increases resulting into decreasing the resistance of the metal wire.
(c) The resistance of a metal wire increases when the temperature is increased as the resistance depends on the nature of the material .