"an external pressure applied to an enclosed fluid is transmitted unchanged to every point within the fluid" is known as
a. bernoulli's principle.
b. pascal's principle.
c. torricelli's law.
d. archimedes' principle.
e. fermat's principle.

B. Pascal's principle.

Explanation:

Pascal's law

  It states that when a pressure is applied to an enclosed fluid then this pressure transfer is every direction with same magnitude.The fluid should be in compressible.

This law mostly used in the high weight lifting machine like when we want to lift our car from one ground floor to the top floor .This is done by the help of hydraulic ram system.

So the answer is B.

B. Pascal's principle.