Two identical wires of iron and copper with their Young’s modulus in the ratio 3:1 are suspended at same level. They are to be loaded so as to have the same extension and hence level. Ratio of the weight is then its new length becomes Young's modulus of rubber is 10^4 N/m^2 and area of cross section is 2 cm^2. If force of 2 x 10^5 dyn is applied along its length October 9, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related