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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.
| 9701. |
What is terminal velocity with expression |
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Answer» Terminal velocity is the maximum constant velocity which aquire the body falling through a viscous mediam \tTerminal velocity is the maximum velocity of a body moving through a viscous fluid.\tIt is attained when force of resistance of the medium is equal and opposite to the force of gravity.\tAs the velocity is increasing the retarding force will also increase and a stage will come when the force of gravity becomes equal to resistance force.\tAfter that point velocity won’t increase and this velocity is known as terminal velocity. |
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| 9702. |
pdf on carnot engine and carnot machine |
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| 9703. |
What is correct definition of thermodynamics? And it\'s use in daily life.? |
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Answer» Nice answer Ayushi Thermodynamics is a physical science describing how systems change when they interact with each other or their surroundings. uses macroscopic, measurable properties. It is used to model exchanges of energy, work and heat based on the laws of thermodynamics. Its uses in macroscopic, measurable properties. Gooogle mein dekho bhaiyaaaaa jiiiiio..... |
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| 9704. |
Easy define of angle of contact... |
| Answer» The angle of contact is defined as the angle that the tangent to the liquid surface at the point of contact makes with the solid surface inside the liquid. | |
| 9705. |
explain if the ice on the polar caps of the earth melts how will it affect the duration of day |
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Answer» When ice on the polar caps will melt then whole water is spread throughout the earth due to this,moment of inertia will increase and by conservation of angular momentum angular velocity will decrease . Since angular velocity , w= 2π/t , therefore time period will increase,i.e.,duration of day will increase Thanq ?? Nice answer Priya Yes the days would be longer.Since the ice that was at the South Pole is now distributed around the world, there is a change in the distribution of mass. Like an ice skater opening their arms. Since the mass is further from the axis of rotation, the rotation slows; which means the days are longer.this due to increase in moment of inertia |
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| 9706. |
what is the time period of a simple pendulum at the centre of earth |
| Answer» Time period of a simple pendulum is T = 2π sqrt (1/g). When g = 0, sqrt (1/g) = infinity. Hence T = Infinity @ center of earth for simple pendulum | |
| 9707. |
10gm of ice at -20°C is added to 10gm of water at 50°C.Find resulting temperature. |
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| 9708. |
Important derrivation for final exam class 11th |
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| 9709. |
What is the basis of caesium atomic clock |
| Answer» To measure a time interval we need a clock. Clocks in India works on the atomic standard of time, which is based on the periodic vibrations produced in a Cesium atom. That’s why Indian clocks are also called Cesium Clock. The standard unit of time is second. | |
| 9710. |
How good Akash institute indore |
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Answer» Thnx for suggestions..!! Right………Akash is.good institute for medical aspirants Thanq Right priya????? Yes u right priya Akash is a very good institute Akash is v.good institute and famous one all over india. In ahmedabad it is good mainly for medical.. they give good coaching study materials,test weekly and many more. Hope it is same in indore also |
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| 9711. |
What is degree of freedom |
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Answer» Degree of freedom refers to the number of directions in which a system is free to move. A pendulum is free to move in only one direction, and hence, has 1 degree of freedom. Ways in which an antom can have or share energy |
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| 9712. |
Sin5x using ab initio methid |
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| 9713. |
Acceleration can be found in which graph |
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Answer» Find Acceleration Using a Velocity Time Graph . Acceleration can be found in v vs t graph. Because the slope obtain from v vs t graph = acceleration of an object |
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| 9714. |
What is a viscosity? |
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Answer» Viscosity is the measure of internal friction of a liquid.This friction arises between different layers of a liquid and offers resistance to the flow of the liquid.Greater is the friction, greater is the amount of force required to cause the movement of liquid.Highly viscous fluids have more fraiction than less viscous fluids.The SI units of viscosity are Kg/ms or Pa s. Molecular force of attraction between the molecules of a fluid Viscosity refers to the resistance to the flow of liquid arising as a result of the internal friction within the layers as they pass over other layer. |
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| 9715. |
Dimensions of stress |
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Answer» ML-1T-2 Dimension of stress is: (ML-1T-2) |
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| 9716. |
What is the phase difference between two nearest crest and trough |
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Answer» \tThe linear distance between two successive crests is equal to one wavelength.\tThe phase difference corresponding to two successive crests is equal to 2 pi radians (or) 360 degrees. 2π |
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| 9717. |
What is Tensile stress or longitudinal strain |
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Answer» Longitudinal strain: If the deforming force produces a change in length alone, the strain produced in the body is called longitudinal strain or tensile strain.\xa0Tensile Stress: If the stress applied causes an increase in the body’s length because of the force the stress is termed as tensile stress. They both are same meaning |
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| 9718. |
Which physics,s book best for class 12 preparation |
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Answer» Hc verma is also a good book for 12th in my view NCERT ( the heart of board physics) |
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| 9719. |
Work energy therom |
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Answer» The Work-Energy Theorem. The principle of work and kinetic energy (also known as the work-energy theorem) states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. Work done by all force is equal to change in kinetic energy. IWork energy therom states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle |
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| 9720. |
What is the pressure on a swimmer 10m below the surface of a lake |
| Answer» Let Pa be atmospheric pressureP=Pa +dgh ( d is density of water)P=1.05×10^5×1000×9.8×10P=1.99×10^5pa P=2 atm (approximately)Therefore the pressure is 2 atm | |
| 9721. |
Why strees is unit less? |
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Answer» Srry my question is wrong Stress-Strain Curves. The tensile stress on a material is defined as the force per unit area as the material is stretched. ... stress: The units of stress are the same as those of pressure.We will use pascals, Pa, as the units for the stress |
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| 9722. |
What is stress and strain?????? |
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Answer» Yes it\'s very useful AnkitThank u so much In simple language Great answer Darshana The ratio of extension to original length is called strain it has no units as it is a ratio of two lengths measured in metres.Strain = extension/ length hope this will help u The stress applied to a material is the force per unit area applied to the material. The maximum stress a material can stand before it breaks is called the breaking stress or ultimate tensile stress.Stress= Force/area stress = stress measured in Nm-2 or pascals (Pa)F = force in newtons (N)A = cross-sectional area in m2 ✴️ The internal restoring force acting per unit area of a deformed body is called stress.✴️ The fractional change in configuration is called strain. Stress:- The restoring force acting per unit area...........Strain:- The ratio of change in dimension and initial dimension... |
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| 9723. |
Prove that alpha=bita/2=gama/3where alpha bita and gama are in usual meaning? |
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| 9724. |
Find out the work done in adiabatic process |
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Answer» W=R(t2-t1)/1-¥ For an adiabatic process of ideal gas equation we have PVγ = K (Constant) Where γ is the ratio of specific heat (ordinary or molar) at constant pressure and at constant voluume γ = Cp/CvSuppose in an adiabatic process pressure and volume of a sample of gas changs from (P1, V1) to (P2, V2) then we have P1(V1)γ=P2(V2)γ=K Thus, P = K/VγWork done by gas in this process is W = ∫PdVwhere limits of integration goes from V1 to V2Putting for P=K/Vγ, and integrating we get, W = (P1V1-P2V2)/(γ-1) In and adiabatic process if W>0 i.e., work is done by the gas then T2< T1If work is done on the gas (W<0) then T2 > T1 i.e., temperature of gas rises |
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| 9725. |
Show that surface energy has the same magnitude of surface tension? |
| Answer» Surface tension of the liquid=Force/lengthmultiply length to both numerator and the denominator=Force x length/length x length =work/area So, this\xa0show that the surface energy per unit area is equal to the surface tension of the liquid.Hope this will help u..... | |
| 9726. |
Working of hydraulic machine along diagram in short |
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| 9727. |
Drive of kinatic energy by calculas method |
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| 9728. |
A car starts from rest and accelerates uniformly for 10 s to a velocity of 36 km |
| Answer» If you want acceleration in this question thenU =0V=36 km/hr = 10 m/secT = 10secA=v-u /tA= 10-0/10A=1m/sec^2 | |
| 9729. |
Relation between surface tension and excess presure for 1-surface and 2-surface. |
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| 9730. |
Define bornoulli\'s theorem |
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Answer» “Bernoulli\'s principle states that an increase in the velocity(v) of a fluid occurs simultaneously with a decrease in pressure(p) or a decrease in the fluid’s potential energy(gz) (where g=acceleration due to gravity,(z)or(h)=height ”. A/q to this theorem, In case of steady flow, non-viscous,incompresible flowing in a tube having non-uniform cross sectional area sum of ,K.E per unit volume and P.E per unit volume constant. |
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| 9731. |
Zeroth law of thermodynamics is dependent on which thermodynamic variables... |
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Answer» Temperature Temperature |
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| 9732. |
Please tell me exam dates.... |
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| 9733. |
CBSE last two year annual exam paper with solutions |
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| 9734. |
Why there is no atmosphere inside the moon |
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Answer» Because the value of escape velocity The main reason is the low value of escape velocity of moon.Escape velocity of moon is the minimum speed required for an object to escape permanently from the gravitatational attraction of the moon.The escape velocity of moon is 2.38km/s. So, all the gases escape from the surface of the moon. Hence, the moon has no atmosphere.\xa0 |
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| 9735. |
Derive equation for excess pressure |
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| 9736. |
Write down the dimensional formula of bulk modulus |
| Answer» its dimensional formula is [ML-1T-2]. | |
| 9737. |
Angle of contact |
| Answer» The angle between tangent to the liquid surface at the point of contact and solid surface inside the liquid is said to be angle of contact. At the line of contact the surfaces force between the three medium must be in equilobrium. (If angle of contact theta < 90°→liquid drop spread over solid surface).(If angle of contact theta>90°→liquid drop will not spread over solid surface). | |
| 9738. |
Explain work done during cyclic process |
| Answer» \tA Process in which the system will come back to its initial state.\tΔU = 0 this means the total heat absorbed equals the work done by the system.\tThe work done by the system in a cyclic process is equal to the heat absorbed by the system. | |
| 9739. |
Can anyone explain angular impulse momentum theorem |
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Answer» Angular momentum is a vector that is parallel to the angular velocity. If there is no net torque acting on a system, the system\'s angular momentum is conserved. A net torque produces a change in angular momentum that is equal to the torque multiplied by the time interval over which the torque is applied. Hope this will help u The angular impulse is the area under the torque – time curve in units of N∙m∙s is equal to the change in angular momentum over the same time interval. In the figure shown below, a non constant torque is applied to a rigid bar which has a moment of inertia of 0.8 kg∙m2 about its axis of rotation. |
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| 9740. |
Ncert class 11 newton laws of motion example solved 5 .4 |
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| 9741. |
How the gravity evolved due to planet |
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| 9742. |
I want readings of some class 11 physics practicals |
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| 9743. |
What is the nature of the work done by frictional force? |
| Answer» Nature of frictional force is opposing ,it always act in opposite direction of applied force but when no force is applied it is zero i-e;static nature of friction force | |
| 9744. |
What is the dimensional formula of Boltzmann constant |
| Answer» ML²T⁻²θ⁻¹ | |
| 9745. |
How to study physics well to clear doubt s and score good marks?? |
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Answer» Actually my physics teacher keep on used to say this .That i simply shared.That\'s it.?? Nice answer lily Write all the formulas in a paper .And memorize it completely.Do the sums using the memorized formula and not by seeing the formula.If 1st formula is wrong try with next formula.Try ,try till u get the answer without seeing the formula.Only by recalling the formula u r supposed to find.U need lot of patience for it.?☺But the true is we don\'t have patience?. |
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| 9746. |
Boyle\'s law with graph |
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Answer» a law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature. At constant temperature pressure is inversely proportional to volume. This is boyle law. The graph of p-v curve is parabolic in which upper part shows compression and lower part shows expansion. I am not able to draw graph on this site |
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| 9747. |
Which topic is good for project?? |
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Answer» It may be ktg also I mean kinetic theory of gases Gravitation is also a good topic Thermodynamics |
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| 9748. |
what is elastometer |
| Answer» An elastomere is a polymer with viscoelasticity (having both viscosity and elasticity) and very weak inter molecular force, generally having low young\'s modulus and higher failure strain compared with other materials. | |
| 9749. |
Why drops of water is dropped in spherical shape? |
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Answer» Due to 6 pie ita R t Yes ,it is due to the surface tension , it is tried to minimum surfaceT=F/L ; F = force acting between the two surface area L= total length contact between the surfaces Explain it. Due to phenomenon of surface tension |
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| 9750. |
What is mean by pascal law? |
| Answer» Pressure in a fluid act in all directions and it is equal in all directions | |