The force required to stretch a steel wire 1 cm^2 in cross section to double its length is (given Y = 2 xx 10^(11) Nm^(-2)) ………. .

The force required to stretch a steel wire 1 cm^2 in cross section to

1.	The force required to stretch a steel wire 1 cm^2 in cross section to double its length is (given Y = 2 xx 10^(11) Nm^(-2)) ………. .
Answer» (a) `10^(7) N` (b) `2 xx 10^(7) N` (C) `10^(11) N` `(d) 2 xx 10^(11) N` Solution :`F = (YA Delta l)/(l), "Here" Deltal = l IMPLIES F = YA` `F = 2 xx 10^(11) xx 10^(-4) = 2 xx 10^(7) N`