Question

define the term resistance. state it's S.i. unit. A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm . Assuming that if it has a uniform cross section , what will be it's new resistance ?​

Answer 1

Answer:

Resistance (R) = 3 ohm Length l = 10 cm New Length (l') = 30 cm = 3 × l R = ρ(1/A) New Resistance : With stretching length will increase and area of cross-section will decrease in the same order Read more on Sarthaks.com - https://www.sarthaks.com/148954/wire-ohm-resistance-and-cm-length-is-stretched-to-30-cm-length-assuming-that-it-has-uniform