Download App

9.1 , fluid mechanics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics9.1 , fluid mechanics1 Mark
MCQ
An $ L-$ shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is $ 10.6 cm$  above the surface of water. ....... $cm$ will be the height of the jet of water coming from the orifice ? Velocity of water stream is $2.45 m/s$ 
  • A
    $0$
  • ✓
    $20.0$
  • C
    $10.6$
  • D
    $40.0$
✓

Answer

Correct option: B.
$20.0$
b
(b)According to Bernoulli's theorem, $h = \frac{{{v^2}}}{{2g}}$
$ \Rightarrow h = \frac{{{{(2.45)}^2}}}{{2 \times 10}} = 0.314 = 31.4\;cm$
 Height of jet coming from orifice
= $31.4 - 10.6 = 20.8\;cm$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 9.1 , fluid mechanics→9.1 , fluid mechanics — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The adiabatic Bulk modulus of a diatomic gas at atmospheric pressure is
→
Due to some force $F_1$ a body oscillates with period $4/5\, sec$ and due to other force $F_2$ oscillates with period $3/5\, sec$. If both forces act simultaneously, the new period will be .... $\sec$
→
A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will:
→
The mass and volume of a body are $4.237g$ and $2.5 \mathrm{~cm}^3$, respectively. The density of the material of the body in correct significant figures is:
→
A box when hung from a spring balance shows a reading of $50 \,kg$. If the same box is hung from the same spring balance inside an evacuated chamber, the reading on the scale will be
→
An electrically maintained tuning fork vibrates with constant frequency and constant amplitude. If the temperature of the surrounding air increases but pressure remains constant, the sound produced will have:
  1. Larger wavelength.
  2. Larger frequency.
  3. Larger velocity.
  4. Larger time period.
→
The number of air molecules in a $(5 \,m \times 5 \,m \times 4 \,m )$ room at standard temperature and pressure is of the order of
→
One mole of an ideal gas expands at a constant temperature of $300 \,K$ from an initial volume of $10\, litres$ to a final volume of $20\, litres$. The work done in expanding the gas is ...... $J.$ $(R = 8.31 J/mole-K)$
→
An aluminium piece of mass $50 \,g$ initially at $300^{\circ} C$ is dipped quickly and taken out of $1 \,kg$ of water, initially at $30^{\circ} C$. If the temperature of the aluminium piece immediately after being taken out of the water is found to be $160^{\circ} C$, the temperature of the water ............ $^{\circ} C$ Then, specific heat capacities of aluminium and water are $900 \,Jkg ^{-1} K ^{-1}$ and $4200 \,Jkg ^{-1} K ^{-1}$, respectively.
→
A bullet moving with a velocity of $200 \,cm/s$ penetrates a wooden block and comes to rest after traversing $4 \,cm$ inside it. What velocity is needed for travelling distance of $9 \,cm$ in same block..........$cm/s$
→