InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 2551. |
the speed of the sprinter 36 kmph. how much time does the sprinter take to cover a distance of 100m? |
| Answer» | |
| 2552. |
What is excitement of physics |
| Answer» Excitement means curiosity to know how it happens or what happens.<br>The excitement of physics comes from the challenge in conducting new experiments for revealing the secrets of nature. The scientific progress is not only qualitative but also quantitative analysis. The basics levels, laws and theories of physics are universal. There is good strategy of approximation. | |
| 2553. |
Find the values of sin(1485) |
| Answer» \xa0sin (-1485°)= - sin (1485)(sin (-x) = -sin x)= - sin (4.360°+45°)= - sin (45°){sin (2nπ+a) = sin a}= -12√12 | |
| 2554. |
Rounding off 18.35 upto 3 digits |
| Answer» 18.4 is the answer | |
| 2555. |
For an ideal gas internal energy depends on |
| Answer» 1tempreture<br>Temperature | |
| 2556. |
1) check the correctness of the relation Sn= u+ a/2(2n-1) b 1/2mv^2=mgh c,v^2-u^2=2as |
| Answer» c) v^2 - u^2 = 2as. [LT^-1] ^2 - [LT^-1]^2 = [LT^-2] [L]. Therefore, as principle of homogeneity is followed, the equation is dimensionally consistent.<br>b) 1/2mv^2 = mgh. [M] [LT^-1] ^2 = [M] [LT^-2] [L]. [ML^2T^-2] = [ML^2T^-2]. Hence, the principle of homogeneity is followed and the equation is dimensionally consistent. | |
| 2557. |
If infinty l^a T^b M^c Then find the formula for frequency. |
| Answer» Frequency = 1/t = t^-1 = [M^0 L^0 T^-1]// | |
| 2558. |
(1) check the correctness of the relation Sn= u+ a/2(2n-1) b 1/2mv^2=mgh c,v^2-u^2=2as |
| Answer» | |
| 2559. |
Limitations of the Dimensional Method |
| Answer» Limitations of dimensionless analysis:\tThis method does not tell us how to determine the proportionality constant value.\tThe method cannot be considered to derive composite relations. Examples s = ut + 1/2 at2\xa0and 2as = v2\xa0– u2.\t\tA formula containing trigonometric function, exponential function, and logarithmic function can not derive from it.\t\tThe method cannot be used to derive the relationship between more than three quantities. | |
| 2560. |
Derive dimension formula of work and force |
| Answer» The dimensional formula of Work is given by,M1\xa0L-2\xa0T-2Where,\tM = Mass\tL = Length\tT = TimeDerivationWork (W) = Force\xa0× Displacement . . . . . (1)Since, Force = Mass × acceleration = M × [L T-2]∴ The\xa0dimensional formula\xa0of Force = M1\xa0L1\xa0T-2\xa0. . . . (2)On substituting equation (2) in equation (1) we get,Work = Force\xa0× DisplacementOr, W = [M1\xa0L1\xa0T-2] × [M0\xa0L1\xa0T0]\xa0= [M1\xa0L2\xa0T-2].Therefore, work is dimensionally represented as\xa0[M1\xa0L2\xa0T-2].The dimensional formula of force is given by,M1\xa0L1\xa0T-2Where,\tM = Mass\tL = Length\tT = TimeDerivationForce = Mass × Acceleration . . . . (1)Since, acceleration = velocity × [time]–1\xa0= [LT-1] × [T]-1Therefore, the\xa0dimensional formula\xa0of acceleration = [LT-2] . . . . (2)On substituting equation (2) in equation (1) we get,Force = m × aOr, F = [M] × [L1\xa0T-2] = M1\xa0L1\xa0T-2.Therefore, Force is dimensionally represented as\xa0M1\xa0L1\xa0T-2. | |
| 2561. |
The area under velocity - time graph for a particle in a given interval of time represents what |
| Answer» Displacement | |
| 2562. |
Project on laws of motion class 11 |
| Answer» | |
| 2563. |
Find differentiation of y=x^x |
| Answer» x^x(1+logx) | |
| 2564. |
Find the number of seconds in a year. Express them in order of their magnitude. |
| Answer» We know that, 1 minute = 60 seconds60 minutes (1 hour) = 60 × 60 = 3600 seconds24 hours (1 day) = 3600 × 24 = 86400 seconds365 days (1 Year) = 86400 × 365 = 31536000seconds{tex}31536000 = 31536 \\times {10^3} = \\frac{{31536}}{{10000}} \\times {10^3} \\times {10^4} = 3.1536 \\times {10^{3 + 4}} = 3.1536 \\times {10^7}{/tex}seconds. | |
| 2565. |
What is the difference between A°and A.U |
| Answer» à” is a preposition of location (with feminine article “la”: at home: à la maison), of possession (in the west of the country (Paul’s dog : le chien à paul (standard French : le chien de Paul)), has some other usages as well related to the prepposition “de”, and sounds exactly like the standard french “a” (the accent on “à” somehow transcripts (in writing only, the spelling is the very same) an archaic expression of an extended locative case) and like “a” in “patagonia” for exemple.“au” has the same use, but will be used with masculine non-personnal names (as the contraction of “a+le”, ex : I’m going to the woods : Je vais au bois (singular) ; aux bois (plural) ; possessive (western French) : the priest’s car : la voiture au prêtre) but will sound like the french “o” in “poteau”, and the english “o” in “obliterate”.<br>A° is also called angstrom. It is a unit of length. 1 A° = 10^-10 m. Whereas, A. U. is also known as astronomical unit. It is equal to 1.5 * 10^11 m. A unit of length. | |
| 2566. |
Difference between strong nuclear forces and weak nuclear force |
| Answer» The strong nuclear force binds protons and neutrons in a molecule in a nucleus. It\'s evident that without some attractive force, a nucleus will be unstable due to the electric repulsion between it\'s proton. The strong nuclear force is the strongest of all fundamental forces, about 100 times the electromagnetic force in strength.Where asThe weak nuclear force appears only in certain nuclear processes such as the β-decay of a nucleus. In a β- decay, the nucleus emits a electron and an uncharged particle called nutrino\'s (fundamental particle). | |
| 2567. |
convert 73km/hr into m/s |
| Answer» 1km=1000m1hr =3600s So,73*1000/3600=73000/3600=7778m/s | |
| 2568. |
What is the angle between vector p and the resultant of p+q and p-q |
| Answer» | |
| 2569. |
How many wat\'s are 1 HP |
| Answer» 1 Horse power (commercial unit) = 746 watts. | |
| 2570. |
solve the following and express the result to an appropriate number of significant figures |
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| 2571. |
conversion of one system of units into another class 11 physics numericals using dimensions |
| Answer» Adha q to smjh me na ata tumhra?<br>Dimensional analysis is the process of converting between units.The International System of Units (SI) specifies a set of seven base units from which all other units of measurement are formed. Derived units are based on those seven base units.Unit analysis is a form of proportional reasoning where a given measurement can be multiplied by a known proportion or ratio to give a result having a different unit or dimension.Dimensional analysis involves using conversion factors, which are ratios of related physical quantities expressed in the desired units. | |
| 2572. |
find the derivatives of all orders of function y = (x ^ 4)/2 - 3/2 * x ^ 2 - x |
| Answer» | |
| 2573. |
d(t*t*t+3t*3t-2t+1)/dt |
| Answer» = d(t³+9t²-2t+1) /dt= 3t²+18t-2Thus your answer is 3t²+18t-2 | |
| 2574. |
Two forces F1 and F2 can be replaced by a single force 5N. If | F1|=2N, then | F2| could possibly be |
| Answer» 1 | |
| 2575. |
Our son is made up of which gas |
| Answer» Helium<br>Hydrogen | |
| 2576. |
Where is lab manual of physics |
| Answer» | |
| 2577. |
Anyone tell me that the my cbse guide application is official of cbse or not |
| Answer» Aman<br>No it is not . Don\'t believe on on others<br>Yes this is an official app of cbse for students | |
| 2578. |
What is resolution in 2nd chap of unit and measurements Phys |
| Answer» | |
| 2579. |
Give examples of dimension analysis |
| Answer» 60 minutes is the same as 1 hour, or 1000 meters is the same as 1 kilometer, or 12 months is the same as 1 year. Let us try to understand it in this way. Imagine you have 15 pens and you multiply that by 1, now you still have the same number of 15 pens. | |
| 2580. |
What is resolution in unit and measurements chap |
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| 2581. |
Distinguish between geostationary and polar satellite |
| Answer» Ja is svhejsi<br>POLAR SATELLITE: These satellites are mainly situated upto 200km to 2000km from the earth’s surface. Some of the examples of polar satellites are pslv, aslv etc.Main functions of polar satellitesland mapping: polar satellites are used for land mapping and the availability of useful land on the earth. In India for that cortosat 1a is responsible for land mapping. Also cortosat 1b which gives info about agricultural aspects .some other satellites which are involved in this are cortosat 2.disaster management: After the disaster of Uttarakhand GOI launched a satellite named SARSAT(save and rescue satellite). The main purpose of SARSAT was to find missing people.GEOSTATIONARY SATELLITE:\xa0The satellites which are located 20000 to 36000 km away from the surface of earth.Main functions are:telecommunicationnavigation<br>POLAR SATELLITE: These satellites are mainly situated upto 200km to 2000km from the earth’s surface. Some of the examples of polar satellites are pslv, aslv etc.Main functions of polar satellites\tland mapping: polar satellites are used for land mapping and the availability of useful land on the earth. In India for that cortosat 1a is responsible for land mapping. Also cortosat 1b which gives info about agricultural aspects .some other satellites which are involved in this are cortosat 2.\tdisaster management: After the disaster of Uttarakhand GOI launched a satellite named SARSAT(save and rescue satellite). The main purpose of SARSAT was to find missing people.GEOSTATIONARY SATELLITE:\xa0The satellites which are located 20000 to 36000 km away from the surface of earth.Main functions are:\ttelecommunication\tnavigation | |
| 2582. |
Give da central idea of da poem |
| Answer» | |
| 2583. |
What does planksconstant mean ? |
| Answer» Tq<br>The Planck constant, or Planck\'s constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon\'s energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. | |
| 2584. |
What is parallax method?? |
| Answer» Parallax is the displacement or the change in the apparent position of the object when viewed from two different points of view. The two points of view have their own line of sights and parallax is measured as half of the angle between the two lines of sights. | |
| 2585. |
Least count error definition |
| Answer» Fztrtziryzr<br>The least count error is the error associated with the resolution of the instrument | |
| 2586. |
Define Unification and Reduction |
| Answer» Unification : Attempt to explain various phenomenons through few laws. Eg:free fall of apples,motion of satellites around planets Explained by universal law of gravitation and second law of thermodynamics Reductionism: To study a large system, to study properties of constituent particles.It helps in future advancement.Eg:generator:armature coil, magnets, slip rings. | |
| 2587. |
Pick out the constant quantity |
| Answer» Any options?<br>Pickout the constant quentity<br>Pickout the constant quantity | |
| 2588. |
Can anyone teach me the parallax method? |
| Answer» Parallax is the displacement or the change in the apparent position of the object when viewed from two different points of view | |
| 2589. |
What should be the properties of a standard unit |
| Answer» Characteristics\xa0of\xa0standard unit:It\xa0should\xa0be of convenient size. It\xa0should\xa0not change with respect to place and time. It\xa0should\xa0be well defined. It\xa0should\xa0be easily reproduced.<br>1. standard units should be easily understable.2. standard units should not change with place or time3. standard units should be in accordance with the size of the quality to be measured .4. standard units should be changed with change in physical factors. | |
| 2590. |
What are ray diagrams of lens in representation ? |
| Answer» Thanks<br>Ray diagrams are the representation of light rays before and after passing thought lens. | |
| 2591. |
Difference between electric potential and electrostatic potential |
| Answer» The is no difference between electrostatic potential energy and electric(al) potential energy. The electric potential at a point is the work done by an external force in moving unit positive charge from an arbitrarily chosen zero of potential (often infinity) to the point. | |
| 2592. |
One nanometre is equal to how much |
| Answer» 10^-9 m<br>10^-9m<br>10^-9 m<br>10 raise to power -9 m<br>10^-9 m | |
| 2593. |
Can anyone tell me why do we refer to heat capacity and specific heat capacity...? |
| Answer» Thermodynamics in its totality is concerned about heat. The meaning of heat today is energy in transit. Before the development of thermodynamic laws, the heat was considered as the measure of an invisible fluid, caloric, present in any matter. The capability of a substance to hold this fluid was then referred to as the heat capacity of that substance. The development in thermodynamics and dependence of heat transfer on temperature changed the definition of heat. | |
| 2594. |
Which are the important books for class 11th PCB stream...?? |
| Answer» Only ncert books<br>NCERT booksbiologyphysicschemistryenglishoptional subject | |
| 2595. |
Check and correct with dimensional analysis m=m^2/√1-v^2. |
| Answer» Don\'t know | |
| 2596. |
According to New cbse rule. IS 11 BOOK CHANGE |
| Answer» No , not any books change<br>Because I am student of SND in this only physics chemistry book change not others<br>Only one or two change not all<br>Yes | |
| 2597. |
Or grandfather paradox kise kehte hai |
| Answer» | |
| 2598. |
Are koi mere answer to do, ki twin paradox ke bare me Einstein ne kya kaha tha? |
| Answer» The grandfather paradox is a paradox of time travel in which inconsistencies emerge through changing the past. The name comes from the paradox\'s description: a person travels to the past and kills their own grandfather before the conception of their father or mother, which prevents the time traveller\'s existence. | |
| 2599. |
Explain how will you measure to the size of an astronomical object? |
| Answer» U have any doubt u can ask me on snap I\'d shubhamkuma8437<br>By using parallax method According to parallax method Parallax Method: When an object is seen by closing our right and left eye alternatively, there is a shift in the position of the h other. O is called parallax angle. The distance LR is called basis. | |
| 2600. |
What is electromagnetic theory |
| Answer» Electromagnetic theory based on Maxwell\'s equations establishes the basic principle of electrical and electronic circuits over the entire frequency spectrum from dc to optics. ... Coulomb\'s law for electric field and potential and Ampere\'s law for magnetic field govern the physical principles. | |