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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.
| 4151. |
d/dx (x + 2)2 |
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Answer» 2 2x+4 |
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| 4152. |
Define progressive and stationary waves and write the equation for these waves |
| Answer» A\xa0progressive wave\xa0has points of given phase, such as a crest or a dip which travel forwards, whilst the medium remains where it is. ...\xa0Standing waves\xa0are formed by the superposition of two travelling\xa0waves\xa0of the same frequency (with the same polarisation and the same amplitude) travelling in opposite directions.\xa0A\xa0progressive\xa0or travelling\xa0wave\xa0moves away from the source , or it moves relative to a coordinate system\xa0in a\xa0fluid , or it advances on the sea surface or at an intermediate depth. A\xa0stationary\xa0or\xa0standing wave\xa0remains\xa0in a\xa0constant position .\xa0A\xa0progressive wave\xa0is a\xa0wave\xa0where continuous energy transfer takes place between the crest and trough (transverse\xa0wave) or between rarefactions and compressions (long\xa0waves). | |
| 4153. |
What is Alveoli?? |
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Answer» Accha hum logo ka bhi main 5 h ek additional h... Hi., Aapka HPE main subject rahega kya 11 me?? Hum log ka to additional rahega... I. T aur hindi me choice h.. ? Gud morning sis... Have a good day.., Alveoli is a baloon structure present in lungs which help in exchane of gases like co2 and o2 |
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| 4154. |
Concept based question on chapter 3 and 4 |
| Answer» Try my question ....i think it is quite good?️ | |
| 4155. |
What is Inertia? 1 |
| Answer» The property of an object by which the object resist the change in its position and motion .and remain unaffected. | |
| 4156. |
What is scaler quantity?? |
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Answer» Fine and you?? Aapki online class cl rhi h kya?? Gm |
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| 4157. |
What do u mean by term significant figures? |
| Answer» In physics, measurements are a way of communicating with the Cosmos. Each measurement yields a numeric value. Each digit of a given number is critical to the process of measurement. As a result, some digits are more important or “significant” than others.In chemistry, Significant figures are the digits of value which carry meaning towards the resolution of the measurement. They are also called significant figures in chemistry. | |
| 4158. |
What do u mean by physical quantity? |
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Answer» The quantities that can be measured are called physical quantity. In physics, a physical quantity is any physical property that can be quantified, that is, be measured using numbers. Examples of physical quantities are mass, amount of substance, length, time, temperature, electric current, light intensity, force, velocity, density, and many others. A physical quantity is always measured of natural non-living objects (Inanimate objects) |
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| 4159. |
Name the strongest and weakest force in nature |
| Answer» Strongest force =strong nuclear force and weakest force= Gravitational force. | |
| 4160. |
What is systematic error? ? |
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Answer» Good eveaning sis.... Kaise ho..... Hii Errors which can either be positive or negative are called\xa0Systematic errors. They are of following types:\tInstrument errors: These arise from imperfect design or calibration error in the instrument. Worn off scale, zero error in a weighing scale are some examples of instrument errors.\tImperfections in experimental techniques: If the technique is not accurate (for example measuring temperature of human body by placing thermometer under armpit resulting in lower temperature than actual) and due to the external conditions like temperature, wind, humidity, these kinds of errors occur. A systematic error is one that results from a persistent issue and leads to a consistent error in your measurements |
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| 4161. |
What is the velocity of two objects moving in opposite direction |
| Answer» When two bodies move in opposite direction, then the Relative Speed = Sum of Speeds i.e for e.g. for a person sitting in a train moving with a Speed of 40 km/hr in the west direction, another train which is going towards east with a Speed of 40 km/hr, will appear to move at a Speed of (40+40) = 80 km/hr. | |
| 4162. |
Differentiation of sin x/x⁴ |
| Answer» Physics which chapter??? | |
| 4163. |
Derive the resoultion of vector 30 degree 2 |
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| 4164. |
How many a.m.u make 1kg |
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| 4165. |
If y=sin30 then evaluate, dy/dt |
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| 4166. |
Sbhi ka admission ho gya h 11th m |
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| 4167. |
How many times is the strong interaction force is larger than the gravitational force? |
| Answer» the strong force is approximately 137 times as strong as electromagnetism, a million times as strong as the weak interaction, and 1038 times as strong as gravitation | |
| 4168. |
I have problem to solve the numerical of ch.2 |
| Answer» Then write the question and I try to make it | |
| 4169. |
Fundament forces in nature. |
| Answer» There are four universal or fundamental forces in nature. Without these forces, all matter in the world will fall apart. Force as such is any pull or push that causes an object to alter its physical state (in terms of motion or deformity). Newton defined a force as anything that causes an object of mass ‘m’ to move with an acceleration ‘a’. Following are the four fundamental forces in nature:\tGravitational force\tElectromagnetic force\tStrong nuclear force\tWeak nuclear force | |
| 4170. |
What is thermodynemics |
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Answer» It is the branch of physics which deals with the heat(thermo) and motion(mechanics). It includes internal energy., entropy etc. Thermodynamics is the branch of Physics which is concerned with the relationship between other forms of energy and heat. We can define thermodynamics as: The branch of Physics that deals with heat and temperature, and their relation to energy, work, radiation, and properties of matter. |
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| 4171. |
What do u mean by term thermodynamics? |
| Answer» The branch which deals with the the movement of energy from one form to the other and the relation between heat and temperature with energy and work done is called as thermodynamics. In other terms we can define thermodynamics as the science stream that deals with the study of the combined effects of heat and work on the changes of state of matter confined by the laws of thermodynamics. | |
| 4172. |
What do u mean by term relativity? |
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| 4173. |
What do u mean by term mechanics? |
| Answer» The general study of the relationship between motion, force and energy is known as mechanics. It is subdivided into three parts i.e. kinematics, dynamics and statics. Kinematics deals with the study of the motion of the objects without taking into account the forces and energies that may be involved. | |
| 4174. |
List of SUB disciplines in physics |
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| 4175. |
What is the definition of limits in integration |
| Answer» The definite\xa0integral\xa0is\xa0defined\xa0to be exactly the\xa0limit\xa0and summation that we looked at in the last section to find the net area between a function and the x -axis. Collectively we\'ll often call a and b the interval of\xa0integration.\xa0Integration, in the most general sense, may be any bringing together and uniting of things: the\xa0integration\xa0of two or more economies, cultures, religions (usually called syncretism), etc.\xa0Integration, in mathematics, a concept of calculus, is the act of finding integrals. | |
| 4176. |
Using calculas method show that v²-u²=2as |
| Answer» \tEquation For Position - Velocity Relation:From the velocity-time graph, the distance s travelled by the object in time t, moving under uniform acceleration a is given by the area enclosed within the trapezium OABC under the graph. That is,s = area of the trapezium OABC = (OA + BC) X OC/2Substituting OA = u, BC = v and OC = t,We gets= (u+v) t/2From the velocity-time relationWe gett= v - u/aWe haves = (v + u) x (v – u)/2aor 2as = v2 – u2 | |
| 4177. |
What is mass spectrograph |
| Answer» Mass spectrometry is an analytical method to find the molecular mass of a compound and indirectly helped to prove the identity of isotopes.A mass spectrometer generates multiple ions from the sample being investigated, then separates them by their specific mass-to-charge ratio (m/z) and then records the relative abundance of each type of ion. | |
| 4178. |
Why 2nd law is actual law of motion |
| Answer» The first law has already given us a qualitative definition of force. Now we are interested in finding out its magnitude. According to Newton’s second law of motion, the net force experienced by a body is directly proportional to the rate of change of momentum of the body. It can be written as:f ∝ dP/dt⇒f ∝ (mv−mu)/t⇒f∝m(v−u)/t⇒f∝ma⇒f=kmaWhere k is the constant of proportionality and it comes out to be 1 when the values are taken in SI unit. Hence the final expression will be,F = ma | |
| 4179. |
Definition of limits in physics???? |
| Answer» limits\xa0is bascially tending certain value to an impossible value, i use the word tending as it is not practically achievable but theoritically is. for eg. Velocity is.\xa0A\xa0limit\xa0tells us the value that a function approaches as that function\'s inputs get closer and closer to some number. The idea of a\xa0limit\xa0is the basis of all calculus. | |
| 4180. |
What do you understand by an object at rest &an object in motion |
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Answer» Motion:-A body is said be in a state of motion if it changes its position continuously with respect to its surroundings with the passage of time.E.g A bus running on a road, a flying bird etcRest:- A body is said to be at rest if it does not changes its position continuously with respect to its surroundings with the passage of time.Eg A book lying on a table. Object at rest in the sense it doesn\'t change it\'s position with respect to it\'s surroundings whereas object in motion changes it\'s position with respect to it\'s surroundings. |
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| 4181. |
Find the angle between the vectors A and B where A= |
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Answer» TAN alpha= (B TAN theta)/(A+B COS theta) Here gives u direction of resultant and theta here is angle btw two vectors ??? |
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| 4182. |
What is order of magnitude of light year in metre |
| Answer» 8 | |
| 4183. |
Accuracy of relation P=puv^-3 P is liner momentum p is density u is velocity v is frequency |
| Answer» Its wrong. The correct should be P=pu^4v^-3 | |
| 4184. |
Check accuracy of relation n=pie/8 Pr power 4/lv |
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| 4185. |
How to convert one joule to erg |
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Answer» Joule is the unit for energyDimension Formula for Joule is [M¹L²T⁻²]Let n1(joule)=n2(erg)n1(M₁¹L₁²T₁⁻²]=n2[M₂¹L₂²T₂⁻²]n2=n1(M₁¹L₁²T₁⁻²] /M₂¹L₂²T₂⁻²]=n1x(M1/M2)¹x(L1/L2)²x(T1/T2)⁻²=1x(1kg/gm)¹x(1m/1cm)²x(1s/1s)⁻²=1x(1000g/gm)x(100cm/1cm)²x(1s/1s)⁻²=10⁷Therefore n1(joule)=n2(erg)∴1 Joule=10⁷erg |
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| 4186. |
How to calculate the value of tan40° |
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| 4187. |
derive the formula for force which depend upon mass and accleration of an object |
| Answer» According to Newton\'s Second Law: If a particle of mass\xa0{tex}m{/tex}\xa0has velocity\xa0{tex}v{/tex}\xa0at any moment\xa0{tex}t{/tex},{tex}\\vec{F}=\\frac{d\\vec{p}}{dt}{/tex}, where\xa0{tex}\\vec{F}{/tex}is the force and\xa0{tex}\\vec{p}=m\\vec{v}{/tex}\xa0is the momentum.Thus,{tex}\\vec{F}=\\frac{d(m{\\vec{v}})}{dt}=m\\frac{d\\vec{v}}{dt}+\\vec{v}\\frac{dm}{dt}{/tex}For cases where mass changes with time, the above equation would be applicable.Special Cases:\tIf mass remains constant, as we see in most theories an numericals,\xa0{tex}\\frac{dm}{dt}=0{/tex}\xa0hence,\xa0{tex}\\vec{F}=m\\frac{d\\vec{v}}{dt}=m\\vec{a}{/tex}, where\xa0{tex}\\vec{a}{/tex}\xa0is the acceleration of the object.\tIf the velocity remains constant but mass emerges out or gets added at a constant rate, as in cases of water coming out of hose pipe, or sands added at constant rate upon a moving belt;\xa0{tex}\\vec{F}=\\vec{v}\\frac{dm}{dt}{/tex}. | |
| 4188. |
For adiabatic process |
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| 4189. |
What are the reasons behind the large scale progress of physics in the last few centuries? |
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| 4190. |
,find deminsial formula of energy |
| Answer» [ M L2 T-2 ] | |
| 4191. |
find the value of 60j per min on a system that has 100g,100cm and 1 min as the base units |
| Answer» 2.16 × 106? | |
| 4192. |
How can we easily understand the integration system and calculus method |
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Answer» Thanks for the advice... Dude abhi class 11 ke starting me calculus samajh me nhi aaye to bhi uske basic formulae yaad kar lo because pure 11th me iska use karna padega aur ise badhia se padhna hai class 12 me.I am ur senior.Its just an advice |
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| 4193. |
established meaning in hindi |
| Answer» Sthapit | |
| 4194. |
What are importance rules of counting and figures |
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| 4195. |
How can we find dimensional formula? |
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Answer» Go through the linkhttps://m.youtube.com/watch?v=JZ8rc02PG5o Play PUBG you can find easily |
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| 4196. |
How can geothermal energy be utilised for power generation.explain breifly.. |
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| 4197. |
Explain briefly the conventional sources of energy |
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Answer» Conventional Sources of Energy:The sources of energy which have been in use since a long time are called conventional sources of energy. Coal, petroleum, natural gas, hydel energy, wind energy and nuclear energy are considered to be the conventional sources of energy. Additionally, firewood is also a conventional source of energy but its usage is now limited to kitchens in rural parts of India.Fossil Fuels:Coal:\xa0Coal was formed millions of years ago. The plants got buried under swamps and due to high pressure and high temperature inside the earth; they were converted into coal. Coal is the highest used energy source in India. During the days of steam engine, coal was used in steam engines. Moreover, coal was also used as kitchen fuel; before LPG became popular. Now-a-days, coal is mainly being used in the industries.Petroleum:\xa0Petroleum was also formed millions of years ago. The animals got buried under the ocean surface and were converted into petroleum; in due course of time. Petroleum is the third major source of energy being used today. Petroleum products are used as automobile fuel and also in the industries. Natural gas mainly comes from oil wells and is also a major source of energy.Non-renewable Sources of Energy:\xa0It takes millions of years for the formation of fossil fuels. Since they cannot be replenished in the foreseeable future, they are known as non-renewable sources of energy.Renewable Sources of Energy:\xa0Those sources of energy which can be replenished quickly are called renewable sources of energy. Hydel energy, wind energy and solar energy are examples of renewable sources of energy. Hydel Energy:\xa0Hydel energy is produced by utilizing the kinetic energy of flowing water. Huge dams are built over a source of water. Water is collected behind the dam and released. When water falls on urbine; the turbine moves; because of kinetic energy of water. Thus, electricity is generated by the turbine. Electricity; thus generated is called hydel energy or hydroelectricity. Water in the reservoir is replenished with rainwater and so availability of water is not a problem for hydroelectricity.Thermal Power Plant:\xa0In a thermal power plant, coal or petroleum is used for converting water into steam. The steam is used to run the turbine; to generate electricity. |
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| 4198. |
Differentiate with respect to x :7x5/x+3 |
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| 4199. |
What is standard unit??? |
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Answer» Aap log ka exam cancel hua h ke nhi?? News me dekha rha tha ke hoga ??? Okk... Bagal me nhi hmare ghar 1 km ke dori pe kisi ko ho gya h.... Hn... Breakfast kar liya h... APKE YHA BAGAL ME BHI KISI KO HO GYA H KYA?? ? DIKU KO LGTA HOGA KOI AATA HI NHI ISLIYE VO BHI NHI AATI HOGI... AAJ BOL DUNGI USSE... Breakfast ho gya??? Mere area seal ho gyi h ? .... Diku sis kyu nhi aati h?? .... Unki pdai kaise cl rhi h? |
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| 4200. |
What is measurement??? |
| Answer» How are you sis.... Pdai kaise cl rhi h aapki... Aapke yha corona ke kya hal chal h..... | |