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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.
| 4501. |
How can I learn physics |
| Answer» physics learn ni ki jaati....smjhi jaati ha..phle saari derivations likh k practice kre...aur baad me ncert ques parlo | |
| 4502. |
Difference between beats and interference |
| Answer» Interference pattern is produced when two waves of same frequency travelling in same direction superimpose, while beats are formed when frequencies are slightly different.In interference, the position of maximum and minimum are permanent i.e., intensity at a given point does not change with time, but in beats the intensity of wave changes at given point with time. | |
| 4503. |
Explain Newton\'s third law of motion |
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Answer» Okk thanx is tiz okk To every action there is always an equal and opposite reaction. All action has equal and opposite reaction. Answer soon |
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| 4504. |
I need detailed sol. of numerical on pg no. 346 ex 14.3 2nd part |
| Answer» (a) sin wt- cos wt = sin wt - sin(pi/2 - wt) = 2 cos(pi/4) sin(wt - pi/4)= root) 2sin(wt - pi/4) | |
| 4505. |
Derivation and formula of doppler effect.... |
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Answer» Yess Need for all cases? |
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| 4506. |
Kelvin scale |
| Answer» The temperature scales of celsius and fahrenheit are not absolute scales. By absolute we mean that they start at some reference point (freezing point of water). Hence, they are considered random scales. So, we associate a degree symbol with random scales. Similar is done with angles. On the other hand, kelvin scale is the absolute scale of temperature. It has a perfect origin. There is no temperature below the zero kelvin temperature. Hence, there is no degree symbol associated with it. | |
| 4507. |
Please list the practicals for session 2019-2020 |
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| 4508. |
Newton\'s law for velocity of sound of gases, |
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Answer» Ya it\'s right Yes it is right answer. Yaa it is possible and 3.10 m/s Newton assume that when sound travels in a gaseous medium the changing take place in the medium are isothermal in nature. |
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| 4509. |
Prove 2nd law of motion as real law |
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Answer» Tere bina jeena saza ho gya ni sanu ishq tere da nasha ho gya ni sadda teri m rooh ban jaavan heeriye Jaan kitthon aa tu jldi aaja mera mann na lg ra tere bina Hiii... Vaise bhi aaj kal m apne phle song apne dam pr khada hu ke promotion ke liye music label dhoond rha hu baaki intezam ho gya kuchh dino baad yrr tera chhaa jayega paisa bhi kamyega naam bhi banayega Mt kr baat kuxhh dino baad mere banneraan nu vekh vekh ke keha kregi ae taan pyar krda tha mainu or m tainu pehchankar bhi ignore krunga autograph bhi nhi dunga Karda cmnt teri taur cat te follow tainu krda snapchat te naal deyaan mundeyaan nal pta kr lae tere bina hor kisi ton na mrda Tootey-2 khwabban vich disda ae tu mainu chadd ajj kal kisda ae tu tere bajon mera koi hor taan nhi haal mera aake kyu ni puchda ae tu Yrr aaj tu mt aa kl m na aaya Hun taan aaja heeriye Sry jaan Aee the 2nd law pata kr ne hame to 2nd relationship pata kr liya Yrr mai toh kaalli rh gi.... Bye bye Don\'t say like this Yrr I just hate myself...sb naraz h mujhse....in fact meri qismat bhi.. Bilkul same situation h idhar bhi Vo bhi aesa hi h.....bhot short - tempered h...class me mujhe koi kuch kh dega toh..ladne ke liye bhag lega mere liye...filhal toh mujhse ladke baitha h... Yrrrrr I told you na..... May be he is busy somewhere I\'m waiting for him....pta nhi vo aaega bhi ya nhi...??? Lakin mere wale ko bahut zada gussa aata h Okay....... Same here....... Actually meri lyf me bhi ek Sanchit h...mera bhai..mera classmate...mera bestiee...in fact meri jaan bsti h mere bhai me.. Or sunao Okay..... Aap vansh ko bta rhi thi tab pta chla tha.... Tell me how do you know Yes but how do you know Apke bestiee ka naam Sanchit h na...?? Kyu............. Don\'t cry..... May be he is busy somewhere *raha Mera bestie bhi pagal sa mere se gussa........ Vase to bhai manti hu lakin........ Kutta sa baat hi ni kar rahs Ohnu meri lod hi nhi ae....vo aab kyu aaega...?? Okay ??sahi h Jind...Haryana... ???....humara toh kl last xam h....final term ka....kl ke baad I\'ll be senior by u... I\'m from UP....... And you Hy relax....... Cool.... Cool By the way...sis...where r u from..???? Kuch ni h..... Final practical chal rahe h......... Exams 4 Feb se h Pkka kamina lga liye ussne...reply na kr... Aur sunao koi navi tajja... Hy vansh........ If you are here....... Then please please reply Okayyyyyyy Nhi...kl toh aache se baat kr rha tha...aaj late ho gyi shyad isliye gussa h... Ladai hui thi kya Kuch hua tha kya Pta nhi....reply nhi kr rha... ??????? Why what happened Not fine....vansh naraz h... I\'m good........ And you Kaisi ho....??? Hi.... Hello........ Di |
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| 4510. |
Define watt |
| Answer» Power is defined as rate of doing work.Power= work done/ time takenPower = energy consumed/ timetakenSince when work is done, an equal amount of energy is consumed.S.I unit of power is Watt.1 watt= 1 joule/ 1 Second.1 watt is the power of an appliances which consumes energy at the rate of 1 joule per second. | |
| 4511. |
Define watt,kilowatt hour and electron volt |
| Answer» \xa0kilowatt hour = 1000watt hour = 100 × 60 × 60 watt sec = 3.6 × 10⁶ J [∵ watt = j/s so, watt.sec = j]hence, kilowatt hour = 3.6 × 10⁶ Jnow, electron volt ,eV = 1.6 × 10⁻¹⁹ C.volt = 1.6 × 10⁻¹⁹ J [ ∵ 1volt = 1J/C so, C.volt = J ]hence, eV = 1.6 × 10⁻¹⁹ J\xa0 | |
| 4512. |
In which two situations is Einstein\'s mass energy equivalence applicable?? |
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| 4513. |
Define doppler effect |
| Answer» Doppler’s Effect\tDoppler Effect is the phenomenon of motion-related frequency change.\tConsider if a truck is coming from very far off location as it approaches near our house, the sound increases and when it passes our house the sound will be maximum. And when it goes away from our house sound decreases.\tThis effect is known as Doppler Effect.\tA person who is observing is known as Observer and object from where the sound wave is getting generated it is known as Source.\tWhen the observer and source come nearer to each other as a result waves get compressed. Therefore wavelength decreases and frequency increases. | |
| 4514. |
Which quantity of rotational motion is comparable with mass in translational motion? |
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| 4515. |
Why the efficiency of heat engine can\'t be 100%? |
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Answer» The efficiency of heat engine can\'t be 100% because heat supplied to the system can\'t be totally used in doing work some enrgy is lost in surrounding .BUT Carnot Engine is not in syllabus Because there is no machine which converts the total heat into work. |
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| 4516. |
I need last ten years questions papers.... Please help. |
| Answer» Check on google | |
| 4517. |
Define centripetal acc. |
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Answer» ????????? Ummmaaahhh Luv u too much swt hrt... Ohk bbye mela shona take care mela baby swt drm babu luv you barbie doll Ohooo... Tune sikha di.... Phle kissi de 1 mithi mithi Ohh seekh gyi saari chalakiyaan Mne aave h mne ques toh nu post kra tha...ki yha baat kr lange...tune toh gd nyt bol diya...?? Centripetal acceleration is defined as the property of the motion of an object, traversing a circular path. Any object that is moving in a circle and has an acceleration vector pointed towards the centre of that circle is known as Centripetal acceleration. |
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| 4518. |
Carnot engine working ?? |
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| 4519. |
Derivation of work energy theorm |
| Answer» Dont use abuse words | |
| 4520. |
Explain Doppler \'s effect |
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Answer» Thanks Doppler’s Effect\tDoppler Effect is the phenomenon of motion-related frequency change.\tConsider if a truck is coming from very far off location as it approaches near our house, the sound increases and when it passes our house the sound will be maximum. And when it goes away from our house sound decreases.\tThis effect is known as Doppler Effect.\tA person who is observing is known as Observer and object from where the sound wave is getting generated it is known as Source.\tWhen the observer and source come nearer to each other as a result waves get compressed. Therefore wavelength decreases and frequency increases. |
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| 4521. |
Basis of Laplace correction |
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Answer» Please I\'m sorry ?? Why you are punishing me ?. It\'s not in my hands this time. What I do Gn? Talk to me when you are free Take care and don\'t get angry please. U don\'t have time I know Np Where are you Thanks ?? No answer |
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| 4522. |
Thermodynamic firts low |
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Answer» It is the law of conservation of energy . Energy can neither be created nor be destroyed . law ka bhi?? ∆H = ∆U +∆W...where H is the heat energy,U is the internal energy nd W be the wrk done by the thermodynamical system...nd i hope tht u ..know the meaning of ∆ nd also...the spelling of first is incorrect.....? |
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| 4523. |
What is bulk\'s modulus? |
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Answer» The ratio of normal stress to the volumetric strain .B=normal stress /volumetric strain =F/A/∆V/V. With in the elastic limit the ratio of the compressive stress to the compressive strain is called bulk modules. Bulk modulus of elasticity is the ratio of normal stress to the volumetric strain.B=-fv / A.∆v |
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| 4524. |
What is stress ?????? |
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Answer» Force/area stress is a word starts from s and end to s Stress is pressure or load which is applied to an object Hope it\'ll help u stress is a physical quantity that expresses the internal forces that neighbouring particles of a continuous material exert on each other. The internal restoring force per unit cross sectional area In the destorted state of the object, the internal reactionary force in the unit area of the object is called stress...........or......... The restoring force per unit area is known as stress . S = F/A.... Hope it will help u... ?? |
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| 4525. |
Steps to get good marks in pysics .steps |
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Answer» Practice derivations , application based questions . Step 1: have good grip on basic concepts Step2: practice less but quality questions |
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| 4526. |
When we rub cloth on our hairs, which charge (- or +) develop on our hair? |
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Answer» -ve charge Negative charge When we rub cloth with hair electrostatic force is produced and and negative charge is produced Khaa se lae ho ye ques...??? |
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| 4527. |
Derive the three kinematics equation |
| Answer» V=u+atS=1/2at^2+utV^2=u^2+2as | |
| 4528. |
Prove that elastic potential energy per unit volume is half stress into strain |
| Answer» We know, Young\'s modulus is the ratio of stress to strain. e.g., Y = stress/strain. if we assume a wire of length L, area of cross section A is fixed at one end and stretched by suspended a load M from the other end due to this extension of wire is x. = 1/2 × load × extension | |
| 4529. |
Force accerlatiin |
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| 4530. |
Important question for sahodya 2019-20 |
| Answer» Study all chapters properly u will find every questions easy | |
| 4531. |
Projectile motion and explain it horizontal projection |
| Answer» When a particle is thrown obliquely near the earth’s surface, it moves along a curved path under constant acceleration that is directed towards the center of the earth (we assume that the particle remains close to the surface of the earth). The path of such a particle is called a projectile and the motion is called\xa0projectile motion. Air resistance to the motion of the body is to be assumed absent in projectile motion.In a Projectile Motion, there are two simultaneous independent rectilinear motions:\tAlong x-axis: uniform velocity, responsible for the horizontal (forward) motion of the particle.\tAlong y-axis: uniform acceleration, responsible for the vertical (downwards) motion of the particle. | |
| 4532. |
Centre of mass In rigid body |
| Answer» Centre of mass of a body or system of a particle is defined as, a point at which whole of the mass of the body or all the masses of a system of particle appeared to be concentrated. | |
| 4533. |
What is adhesive |
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Answer» Adhesive means attached between molecules or any other thing . in other words , it works like a glue . i hope you can understand this. Adhesion happens between two dissimilar molecules or substances.Adhesion is generally the force of attraction present between the water molecules and the walls of xylem vessels.Capillary action and meniscus (the curved surface which is formed by any liquid in a cylinder) are the effects of adhesion. The force of attraction between molecules of different substances example oil -water |
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| 4534. |
explain bournellis principal |
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Answer» It states that the sum of pressure energy, kinetic energy, and potential energy per unit volume of an ideal fluid (incompressible, non viscous, steady flow and irrotational) remains constant. In fluid dynamics, Bernoulli\'s principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in static pressure or a decrease in the fluid\'s potential energy. The principle is named after Daniel Bernoulli who published it in his book Hydrodynamica in 1738. It states increase in speed of fluid and decrease in static pressure simultaneously. OKKKKK |
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| 4535. |
Derivation of elastic potential energy |
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| 4536. |
Define newton first law of motion |
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Answer» According to Newton\'s 1st law of motionA body will not change its position ( rest or motion) until the external force applied on it. Same as ncert |
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| 4537. |
Which is shm equation |
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Answer» X=Acos(wt+C) x(t)= A cos (wt +¢) where A w and ¢ are constant w is omega and ¢ is phi |
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| 4538. |
Pascal\'s law of dervation. |
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| 4539. |
What isthe importance of the Bernoulli\'s Theorm ??? |
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Answer» Bernoulli\'s Principle is the single principle that helps explain how heavier-than-air objects can fly. Bernoulli\'s Principle states that faster moving air has low air pressure and slower moving air has high air pressure. Air pressure is the amount of pressure, or "push", air particles exert Bernoulli\'s theorem is the only principal which states that how can the object heavier than air can fly it also states that faster moving has low air pressure while the slow moving air has higher pressure. Because it tell about the energy conservation during a streamline flow |
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| 4540. |
Discuss analytically stationary waves for string and closed organ pipe |
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| 4541. |
Work energy theory |
| Answer» 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. | |
| 4542. |
Expression for work done in isothermal and adiabatic |
| Answer» 2.303 × nRT log (V2/V1) | |
| 4543. |
Zeroth law definition |
| Answer» Zeroth law of thermodynamics states that when two systems are in thermal equilibrium through a third system separately then they are in thermal equilibrium with each other also.\tFor eg: - Consider two systems A and B which are separated by an adiabatic wall. Heat flow happens between systems A and C, and between B and C, due to which all 3 systems attain thermal equilibrium. | |
| 4544. |
Derive an equation of center of mass |
| Answer» The center of mass (CoM) is not an equation, it\'s a definition.The center of gravity, on the other hand, is an equation.So yes, that formula is just a definition, but it is not a random one. After you define it, it turns out to have multiple nice properties. But that\'s not by chance, but because of that special form.And that\'s because it is the weighed average position. That means, it is the average position, but weighed according to masses.If you have two masses, m1 and m2, in positions 1 and 2, then you would easily compute average in the same way you calculate your average score in school:r⃗ mean=r⃗ 1+r⃗ 22And it is obviously right in the middle of them. Half the distance. Notice that this is the same asr⃗ mean=12(r⃗ 1+r⃗ 2)Now, what if m2 is twice m1? Then m2 is like having two units of m1 placed in the same site. That\'s like having three particles:r⃗ mean=r⃗ 1+r⃗ 2+r⃗ 23=r⃗ 1+2⋅r⃗ 23And that\'s the same asr⃗ mean=13(r⃗ 1+2⋅r⃗ 2)=13r⃗ 1+23r⃗ 2Can we generalize this? What if it is m2=1.5m1? or any other? Check that 1/3 and 2/3 are precisely m1/M and m2/M, where M is the total mass.So yes, we haver⃗ CM=m1Mr⃗ 1+m2Mr⃗ 2+⋯=1M∑imiri→The usual formula. It\'s a definition, yes, but it is the average, and that makes it have special properties that other definitions would not have. | |
| 4545. |
Derivation of terminal velocity |
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Answer» Are tu padhti bhi hai kya??? the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration. |
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| 4546. |
Give two examples with reason when body become weightless |
| Answer» Earth orbiting astronaut are weightless free falling elevator is weightless this is because there is no external contact force in pushing or pulling up on their body the force of gravity is the only force acting upon their body. | |
| 4547. |
Give two applications of elastic behaviour of material |
| Answer» The rubber strip of the slingshot has high elasticity. Elasticity is the ability of a body to resist any permanent change to it when stress is applied. When stress application ceases, the body regains its original shape and size. Different materials show different elastic behavior. Almost every engineering design requires knowledge of the elastic behavior of materials. In a construction of various structures like bridges, columns, pillars, beams, etc. knowledge of the strength of the materials used in the construction is of prime importance. | |
| 4548. |
The internal energy of an ideal gas depends on ........? |
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Answer» The internal energy of a fixed mass of an ideal gas depends only on its temperature (not pressure or volume). The specific enthalpy of a gas described by pV = nRT also depends on temperature only. Note that the enthalpy is the thermodynamic quantity equivalent to the total heat content of a system. The internal energy of an ideal gas depends only on the temperature not on the pressure and volume. |
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| 4549. |
Change in state and latent heat from thermal properties of matter |
| Answer» Change in state: is a reversible physical changes that donnot bring any change in chemical constituent.Laten heat : amount of heat supplied per unit mas of a substance diring a change of state | |
| 4550. |
Find value of CP and CV and gama monocromotic and diomectic gas concedring translation motion along |
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