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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 11901. |
What is terminal velocity and derive? |
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Answer» Fdownward=Fupward The constant velocity achieved by a ball when falling through a viscous fluid is called terminal velocity.The velocity is constant because net upward force is equal to net downward force. Look pradeep for derivation When a substance falls in a viscous medium it acquires a constant velocity after a certain time due to force exerted by medium is called terminal velocity. |
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| 11902. |
Write the expression for escape velocity. |
| Answer» √2gR | |
| 11903. |
Define capillary rise |
| Answer» Due to tangentional force on surface of water knows as surface tension water rises in the capillary tube till it balances weight. | |
| 11904. |
How fishes can survive in the extreme winter when ponds and lakes are frozen???? |
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Answer» Becoz at upper part their is hard or soft layer of ice but their is water below it and tempt is also more as compared to upper layer so fish can survive there bcoz temperature at bottom is higher than top layer of lake and has no ice that time fishes live at the bottom of lakes or pond . temperature is lower in bottom than upper Because they are fish |
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| 11905. |
Main theorems of physics syllabus |
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Answer» Theorem of parallel axis and theorem of perpendicular axis I know the one which is too important i.e.Bernoulli\'s theorem that will come 100% |
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| 11906. |
What is moment of inertia ? |
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Answer» I=MK^2 The property of body by virtue of which a body opposes the reative motion Moment of inertia is the product of mass and square of distance of the mass from the axis of ratation |
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| 11907. |
Why moon has no atmosphere? |
| Answer» Because escape velocity of moon is very less, | |
| 11908. |
Drive elastic collision in two dimensions |
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| 11909. |
Can water be boiled without heat |
| Answer» Yes by decreasing the pressureThe boiling point of water will decrease and water will boil at room temp | |
| 11910. |
What is so unit of momentum |
| Answer» Kg×m/s | |
| 11911. |
Buoyle\'s law |
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Answer» P/v t const It states that , at constant temperature pressure of gas is inversely proportional to its volume . |
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| 11912. |
Describes notes on chapter thermal properties of matter |
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| 11913. |
Tell me some imp derivation of all chapter |
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| 11914. |
State bernoulli\'s theorem ? |
| Answer» According to bernoulli\'s theorem When we move along a straight path the sum of pressure p, the K. E per unit volume and the P. E per unit volume remains constant | |
| 11915. |
What is waves?explain briefly. |
| Answer» The transfer of energy and momentum without actual displacement of a medium particle is called as a wave. | |
| 11916. |
State and process the law of equipartition of energy |
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| 11917. |
What is reductionism |
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| 11918. |
An electric bulb rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be...? |
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| 11919. |
What is surface tension and how it causes?? |
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Answer» The molecules at the surface of fluid experiences a net force downwards and hence it is always under the action of net a force. This gives rise to surface tension and molecule act as a stretched membrane trying to reduce its surface area. It is the property of a fluid due to which the free surface of liquid behaves like a stretched membrane |
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| 11920. |
What is speed of time |
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| 11921. |
What is theRelation between time travel and speed of light |
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| 11922. |
Relation between accleration due to gravity and gravitational field |
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Answer» I = g Intensity of gravitational field at a point p is equal to the gravitational force experienced by a body of unit mass placed at that point. We know that F = mg (According to Newton\'s 2nd law). also F = GMm/r^2 On comparing mg = GMm/r^2 g=GM/r^2 |
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| 11923. |
What is the angle between (A+B) and (A-B)for which |A+B|=|A-B| |
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| 11924. |
What is the pressure on a swimmer 100m below the surface of lake? |
| Answer» 11.013 atm | |
| 11925. |
Intensity of radiation on the basis of photon of light |
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| 11926. |
How to prepare for finals |
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| 11927. |
what is nuclear force |
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| 11928. |
Application for elasticity |
| Answer» For construction of bridges | |
| 11929. |
Excess pressure in bubble |
| Answer» 4S/R | |
| 11930. |
Define pascle\'s law |
| Answer» Pressure applied by the part of the liquid in equilibrium is equally transmitted in all direction | |
| 11931. |
Formula of power of lens |
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Answer» P= reciprocal of focal length Diopter (D) |
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| 11932. |
write any two properties ofstreamlines. |
| Answer» 1. The molecules of streamline flow does not cross each other2. These molecules are flow in straight line | |
| 11933. |
Show that two statements of second law of thermodynamics are equivalent ? |
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| 11934. |
What is centripital acceleration |
| Answer» The acceleration is directed along the radius if the Circular path and towards the centre centripetal acceleration | |
| 11935. |
Why pressure decrease and velocity increase when water pass through a narrow pipe? |
| Answer» From equation of continuitiy velocity is inversely proportional to area of pipe and pressure decreaseaBcoz area is decreasing and weight is decreasing. | |
| 11936. |
Bernoullis principle |
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Answer» Sum of energies at any cross section through flowing fluid remain const It state that , " the sum of the pressure energy , kinetic energy and potential energy per unit volume of ( an incompressible , non - viscous fluid in a stream line irrotational flow ) ideal fluid remains constant along a stream line ." |
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| 11937. |
What is simple pendulum? |
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| 11938. |
Is turbulence a boon or a bane |
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| 11939. |
A piece of chalk immerse in water emits bubbles in all directions . why? |
| Answer» in my views...i think it has air filled inside it...so when it immerse in water the air should need to come out of chalk...so the air comes outside in the form of chalk. | |
| 11940. |
How to estimate error in division |
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| 11941. |
cp-cv =r prove |
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Answer» It is derivation from chapter- 6 thermodynamics class- 11 chemistry. For this you can refer to your chemistry reference or your school - tution chemistry notes. In ncert book ya physics refresher u got it |
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| 11942. |
Frequency is the most fundamental property of a wave .why? |
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| 11943. |
Derivation of coefficient of viscosity |
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| 11944. |
Equation of plane progressive wave |
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| 11945. |
1 St Law of neuton in motion |
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Answer» An object at rest remains in rest and an object in motion remains in motion until and unless an unless an external force is applied on it. an object continues its state of rest or uniform motion of body until it is compelled by some external force. |
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| 11946. |
Give the derivation of pasacal law |
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| 11947. |
Periodic wave function |
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| 11948. |
Derive expression for orbital velocity |
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| 11949. |
NCERT example question thermal propertywhat question example 11.4 |
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| 11950. |
What is Bernoullis principle? |
| Answer» When velocity of blowing air or something increases then pressure decreases on that side. Eg :a man standing on platform of station experience pressure from his backside when fast moving train moves from his front because air gets trapped their and moves with train at high velocity so pressure decteses on that side but pressure from behind reamains same so man feels force and gets toward train That is why it is not allow to stay near platform when train is about to arrive | |