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The hydraulic brake works on the principle of

  • A.Pascal's law
  • B.Boyle's law
  • C.Coulomb's law
  • D.Bernoulli's law

Answer: A

The hydraulic brake works on Pascal's law.

Pressure applied to an enclosed fluid is transmitted undiminished throughout it, so a small force on the master cylinder produces a large force at the wide brake cylinders: \[\frac{F_1}{A_1} = \frac{F_2}{A_2}\] It also ensures all four wheels are braked equally.

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