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Derive Bernoulli‟s equation
You can squirt water from a garden hose a considerably greater distance by partially covering the opening with your thumb. Explain how this works.
State Bohr’s postulates of the atomic model.
A refrigerator transfers heat from a cold body to hot body. Does this not violate the second law of thermodynamics? Give reason.
State the second law of thermodynamics.
State Bernoulli principle.
Two spherical raindrops of equal size are falling vertically through the air with a certain terminal velocity. If these two drops were to coalesce to form a single drop and fall with a new terminal velocity, explain how the terminal velocity of the new drop compares to the original terminal velocity
If the Earth were to shrink suddenly, what would happen to the length of the day? Give reason.
Explain why angular velocity of the Earth increases when it comes closer to the Sun in its orbit.
Define “moment of inertia‟
Define “surface tension”.
What is the point where the seismic waves start called?
epicentre
hypocentre
metacentre
seismic centre
A coil having turns and cross-section area carries current . Which physical quantity does the product represent?
magnetic flux of the coil
magnetic flux density of the coil
magnetic moment of the coil
magnetic susceptibility of the coil
What is the coefficient of performance of an ideal refrigerator working between ice point and room temperature ?
$0$
$1$
$10$
What will be the height of a capillary on the surface of the Moon if it is on Earth?
$h$
$\frac{h}{6}$
zero
A horizontal stream of air is blown under one of the pans of a beam balance as shown in the figure. What will be the effect of this on the pan?
goes up
goes down
remains unaffected
rotates
Which one of the following directly affects the quality of sound?
shape of the source
frequency
intensity
wave form
Calculate the charge on the oil drop.
One way of measuring the magnetic flux density could be the use of a Hall probe. Suggest one reason why Hall probe is not a suitable instrument to measure the magnetic flux density for the arrangement shown in the below figure.
State Law of electromagnetic induction