CBSE Class 10 Answered

Hi Ananay!

That's a very good question!

Clearing your doubts on 'Resistance the constant':

• The occurrence of Resistance in the Ohms Law explains that it is a mathematical consequence of direct proportionality being converted into equality and 'R' coming up as the coefficient of proportionality. This is how it is different from Gravitational constant which is actually a universal constant.
• Now, in terms of resistance not having a fixed value, it should be noted that resistance does have a fixed value but for that particular wire or conductor only. Therefore, it can be concluded that resistance is constant for that particular wire but not a universal constant.
• The value of resistance is fixed for a wire and it depends upon the length, cross-sectional area and the materialistic property ρ " /> (rho)