A horizontal pipe of ‘D1’ diameter is joined by sudden enlargement to a ‘D2’ diameter pipe. If D2 is two times of D1, then the head loss due to sudden expansion is ________.
1
\(\rm \frac{3V_2^2}{2g}\)
2
\(\rm \frac{4V_2^2}{2g}\)
3
\(\rm \frac{16V_2^2}{2g}\)
4
\(\rm \frac{9V_2^2}{2g}\)