Two water pipes of diameters 4 cm and 8 cm are connected to a supply line. The velocity of flow of water in the pipe 4 cm diameter is:
Correct answer: B. 4 times
- A. ¼ times
- B. 4 times
- C. Twice
- D. ½ of 8 cm diameter pipe
Explanation
The velocity of flow of water in a pipe is inversely proportional to the square of its diameter, according to the principle of continuity.Mathematically, the equation is:v1 /v2 =(d22 /d12 )
Last updated
About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
Practise Optics
665 free Optics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 7 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
8If the two sound waves produce beats, it is necessary that the two have:
A 16 cm long image of an object is formed by a convex lens on a screen placed normal to its principal axis. On moving the lens towards the screen, without changing the positions of the object and the screen, a 9 cm long image is formed again on the screen. The size of the object is:
A 4 cm high object is located 10 cm from the converging lens, whose focal length is 20 cm. The image so formed will be
A beam of electrons can
A beam of electrons can: