Select the correct expression to calculate the change in length of the portion BC of the bar ABCDE, in the given figure.
(Given, E = Young's modulus of elasticity, L2 = length of portion BC and A = cross-section area of the portion BC; ignore the units of the all the quantities)
1
\(\frac{4 L_2}{A E}\)
2
\(\frac{E L_2}{8 A}\)
3
\(\frac{8 L_2}{A E}\)
4
\(\frac{6 L_2}{A E}\)