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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.
| 10151. |
Solve for x4x^2-4ax+(a^2-b^2)=0 |
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| 10152. |
Give three limitations of dimensinal analysis |
| Answer» 1. It gives no information whether a physical quantity scalar or vector.2. It doesn\'t tell about dimensionless constant in this formula.3.we cannot derive formula containing trigonometric function,exponential function etc which have no dimension. | |
| 10153. |
Find a unit vector parallel to the resultant of the vectors=vectorA=2 |
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| 10154. |
Convert 1 kilometre per hour to centimetre per second square |
| Answer» 1 kilometer/hour [km/h] = 27.7777777777778 centimeter/second [cm/s] | |
| 10155. |
What is the dimension of density? |
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Answer» Thank you esha [M/L³] |
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| 10156. |
Find the difference (I)y=8sinx +16cosx (ii) y=(3+x) (x+4) (iii) y =sin squre x |
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| 10157. |
Explain different types of error in detail with example |
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Answer» Relative error, ebsolute error, percentage error, and meanebsolute error 1. Absolute error2. Zero error |
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| 10158. |
How to find the resultant of the forces A=4î-3j and B=6i+8j |
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| 10159. |
What is initial velocity |
| Answer» Starting points | |
| 10160. |
Two wires A and B . If the radius of A is 3 times than that of B |
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| 10161. |
Why a magnet attracts iron.. |
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Answer» How earth attracts everything Magnet attracts iron due to the influence of their magnetic feild upon the iron. Before a picec of iron enters the magnetic feild of a magnet polarization of the irons atom is random. When exposed the magnetic feild the atom begins to alight their electrons with the flow of magnetic feild which make the iron magentized as well. This in trun creates an attractio between two magnetized objacts. |
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| 10162. |
Which is good lab manual for physics |
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Answer» Candid Sugandha Thanks Arihant |
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| 10163. |
Elastic behaviour of solids |
| Answer» Solid objects will deform when forces are applied on them. If the material is elastic, the object will return to its initial shape and size when these forces are removed. | |
| 10164. |
Elastic behaviour |
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| 10165. |
Convert acceleration due to gravity 9.8 m / s square in CGS . |
| Answer» Gravitational acceleration is 9.81 m/s². By using the conversion 1 m = 100 cm, we can find it in CGS. This gives us 981 cm/s². | |
| 10166. |
Describe parallax method to find the distance of near star and size of the moon |
| Answer» Three relative height in position of an object with respect to the background is called parallel | |
| 10167. |
What is nutrino? |
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Answer» Thanks Nutrino is the field particle of weak force which is about 10²5 times stronger than the gravitational force ? |
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| 10168. |
Derive acceleration from velocity-time graph. |
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| 10169. |
Convert 980 cm/ second square into km/ min square |
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Answer» 980cm/s^2 ×1×1.980cm/s^2 ×1km/100000cm ×60s^2/1min.980×60×60/10000 = 98×36/100=3528/100. Then, 35.28 km/min^2 35.28 km / (min square) |
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| 10170. |
Define personal error |
| Answer» Personal errors: Errors occurring due to human carelessness, lack of proper setting, taking down incorrect reading are called personal errors.These errors can be removed by:\tTaking proper instrument and calibrating it properly.\tExperimenting under proper atmospheric conditions and techniques.Removing human bias as far as possible | |
| 10171. |
Notes on heat internal energy and work |
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| 10172. |
When physics was come? and what is physics |
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| 10173. |
What is the difference between net force and acceleration |
| Answer» If a net force acts on the body then the velocity of the body either increases or decreases. Thus, this rate of change of velocity of the body is acceleration. ... If the same force is applied to two different bodies then the one with a smaller mass will have greater acceleration. | |
| 10174. |
Displacement time equation for nth second -s=ut+1/2at.t |
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Answer» I don\'t understand it clearly Take this equation for n and then for n+1 then subtract n+1 equation from n equation and u will get the answer???{n or n+1 in the place of t} |
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| 10175. |
What is the difference between A degree and Astronomical unit |
| Answer» Adegree is angstroms it is 10-10\xa0where as AU is astronomical unit distance between sun and earth 15 crore km | |
| 10176. |
What is measurement |
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| 10177. |
Uses and limitations of dimensional analysis |
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| 10178. |
An bomber flying at an angle of 53 vertical release an bomb at an |
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| 10179. |
How many parsec are there in one metre ....? |
| Answer» 1 metre = 3.241 x 10^-7 parsec | |
| 10180. |
Why is gravitational force is called weak force? |
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Answer» Long range of attraction between two objects Gravitational force is weak force because it only applied between two celestial body having high mass |
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| 10181. |
What is the use of vector |
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Answer» I waiting here Give me the ans You are a bio student For determination of magnitude and direction. |
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| 10182. |
What is division rule |
| Answer» A divisibility rule is a shorthand way of determining whether a given integer is divisible by a fixed divisor without performing the division, usually by examining its digits. | |
| 10183. |
What r the factors effecting elastic behaviour of solids |
| Answer» \tEffect of stress.\tEffect of annealing.\tChange in temperature.\tPresence of impurities.\tDue to the nature of crystals. | |
| 10184. |
How many light years are there in 1 metre seconds |
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Answer» 9.476 * 10^15 {tex}\\ {1.057 \\times 10^{-16}}{/tex} light years are there in 1 meter.The value of light years in terms of meter is based upon the conversion factor as both are the measure of distance being the fundamental quantity. There are 7 fundamental quantities of which length is the fundamental quantity and measure of length is known as distance. Light years and meter both are units of distance.{tex} 1 \\text { light year }=9.46 \\times 10^{-15}.{/tex}Thereby, {tex}1 \\text { meter }=\\frac{1}{9.46 \\times 10^{-15}}\\ \\text{light year}{/tex}{tex}\\Rightarrow 1 \\text { metre }=1.057 \\times 10^{-16}\\ \\text{Light years}.{/tex}\xa0 |
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| 10185. |
Unit of potential different |
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Answer» Voltage Voltage Volt |
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| 10186. |
Diamensional formula of electric charge |
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Answer» A1t1 Ampere × time |
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| 10187. |
Temperature is a scalar or a vector quantiy? |
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Answer» Scalar Scalar quantity Scalar Scalar |
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| 10188. |
What is physical unit |
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| 10189. |
Is time vector .. yes but how?? |
| Answer» It continue to move future | |
| 10190. |
How thita=b/D in parallax method |
| Answer» Let we take the angle tita and we know that tita =arc÷radius therefore we take arc as b and radius as D | |
| 10191. |
Which one is more elastic rubber or steel . Explain |
| Answer» Let length and area of rubber and steel rod = l and a respectivelyLet Yr = Young’s modulus of elasticity for rubberYs = Young’s modulus of elasticity for steel when Stretching force F is applied, Let{tex}\\Delta l r{/tex} Extension in rubber{tex}\\Delta{/tex} ls = Extension in steelNow, {tex}\\Delta l r{/tex} will be greater that ∆ls.Now {tex}Y = \\frac { F l } { a \\Delta l } = \\frac { \\text { Normal stress } } { \\text { Longitudinal strain } }{/tex}So, {tex}\\mathrm { Yr } = \\frac { F l } { a \\Delta l r } ; \\mathrm { Ys } = \\frac { F l } { a \\Delta {l} s }{/tex}Since {tex}\\Delta l r > \\Delta l s{/tex}So, Yr < YsHence more the modulus of elasticity more elastic is the material, so, steel is more elastic than rubber. | |
| 10192. |
Whate is unit |
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Answer» Unit of a quantity is the standard measurement of same quantity for purpose of comparison Units are standards for measurement of physical quantities |
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| 10193. |
Derivation of v=v0 +at ,x=v0t +1/2at2, v2=v02t 2ax |
| Answer» it is according to algebric method becoz calculus method is not possible herev=u+at a=v-u/tv-u=atv=u+at | |
| 10194. |
Convert an energy of one joule into ergs |
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Answer» 1 j = ? ergX U = x uX [ M1 L1^2 T1^-2 ] = x [ M2 L2^2 T2^-2 ]x = 1[ M1 L1^2 T1^-2/ M2 L2^2 T2^-2 ] x = [ M1 / M2 ] [ L1 / L2 ]^2 [ T1 / T2 ]^-2 x =[10^3/1] [10^2/1]^2 [1/1]^-210^3 × 10^4= 10^7 Its very easy |
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| 10195. |
Can a body have constant speed with varying velocity? |
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Answer» Yes, # change in velocity means change in magnitude as well as in direction, the given condition is possible when a body travels in circular path When body moves in circular path with constant speed but its direction keep changing and hence velocity keep changing Yes |
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| 10196. |
Is physical world chapter important |
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Answer» Yes Not much but it is a connecting link between 10&11 |
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| 10197. |
Time period of an ocillating drop of radius r density raw and surface tention is T=k raw{ r |
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| 10198. |
What are the errors and their uses |
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| 10199. |
What is the dimension of slap |
| Answer» slap\xa0{tex}\\times{/tex} speed = PowerDimension of slap\xa0=\xa0{tex}\\frac{Power}{speed}{/tex}= M1L2T-3/M0L1T-1= M1L1T-2 | |
| 10200. |
What is prototype metre |
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