Manipal Entrance Test 2013 Physics Paper

Since liquid is incompressible there is no change in volume.
When strain is small the ratio of the normal stress to the volume strain is called the bulk modulus of material of the body.
B=

normal‌stress

volume‌strain

= normal stress
change in volume/original volume
since, the liquid is incompressible change in volume is zero.
B=

normal‌stress

0

=∞
Hence, bulk modulus is infinite.