According to Pascal's law, pressure applied to an enclosed fluid is transmitted MCQ with Answer and Explanation

According to Pascal's law, pressure applied to an enclosed fluid is transmitted

A. Undiminished in all directions

B. With loss of magnitude

C. Only in downward direction

D. In direction of flow only

Answer: Option A

Solution (By JKExamLibrary)

Pascal's law: pressure applied to a confined incompressible fluid is transmitted equally and undiminished in all directions. Hydraulic lift, hydraulic brakes work on this principle. P = F₁/A₁ = F₂/A₂.

This question belongs to: Science Physics

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Question #1 Report Error

For an organ pipe completely closed at one end, the fundamental frequency is f. What are the frequencies of the next two higher harmonics?

A. 2f and 4f

B. 3f and 5f

C. 2f and 3f

D. 4f and 6f

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Correct Answer: Option B

Explanation:
An organ pipe closed at one end features a node at the closed end and an antinode at the open end. Because of these boundary conditions, it can only support odd harmonics. If the fundamental frequency (1st harmonic) is f, the next permissible frequencies are the 3rd harmonic (3f), 5th harmonic (5f), 7th harmonic (7f), and so forth.

This question belongs to: Science Physics

Question #2 Report Error

A wave has frequency 50 Hz and wavelength 0.6 m. Its speed is

A. 0.012 m/s

B. 83.3 m/s

C. 300 m/s

D. 30 m/s

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Correct Answer: Option D

Explanation:
Wave speed v = fλ = 50 × 0.6 = 30 m/s. Basic wave equation. Ensure consistent units: frequency Hz (s⁻¹), wavelength m. Speed of sound 340 m/s in air, this is slower.

This question belongs to: Science Physics