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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.
| 101. |
Unit vector |
| Answer» Unit vector is a vector which has a magnitude of one.<br>Vector in which magnitude is one and shows direction is called as unit vector. | |
| 102. |
What is principle of homogeneity |
| Answer» Only that formula is correct,in which the dimensions of the various terms on one side of the relation are equal to the respective dimensions of these terms on the other side of the relation<br>Principle of homogeneity is said that same physical quantity or same dimensional formula are add or subtracted between two quantities.<br>Thanks but i can\'t understand what do u mean by this can u explain for this<br>When we add or subtract quantities then it is same quantity | |
| 103. |
3.26q ch 3 class 11 |
| Answer» 1/root2 | |
| 104. |
What is Spin force |
| Answer» Spin is an intrinsic form of angular momentum | |
| 105. |
Best slogan on the topic of rain water harvasting in english |
| Answer» \tHarvest the rain, reap the grains.\tA drop harvested is a crop harvested.\tMake water everybody\'s business.\tMake running water walk. | |
| 106. |
What is mean by i cap and j cap |
| Answer» i cap along the x axis and j cap. OKAY<br>These are unit vector along x,y axis . | |
| 107. |
A body has a acceleration of 5km/h .find. its value in cgs |
| Answer» Correct<br>Is it 5 km/h^2, then the answer is 0.5 or 1/2592 in cgs | |
| 108. |
Check the method of dimensions wheather the follwoing equation is correct or not e=mc^2 |
| Answer» | |
| 109. |
Find the component of B vector along A vector. |
| Answer» | |
| 110. |
Characteristics of physical unit |
| Answer» Physical cu | |
| 111. |
Two towns a and b are connected by regular bis services |
| Answer» | |
| 112. |
Find the vector 4i+3j+k and vector 12i+9j+3k |
| Answer» 48(1)+27(1)+3(1)= 78<br>0 | |
| 113. |
What is the principle of homogeneouty? |
| Answer» According to the principal of homogeneity a physical equation will be dimensionally correct if the dimension of all the term occurring on both side of the equation are the same | |
| 114. |
What is instantaneous velocity?? |
| Answer» The velocity at any instant on a plane is called Instantaneous velocity.FOR EXAMPLE--- velocity at time t=8th sec,t=10th sec etc.<br>the velocity of an object at a particular instant of time or at a particular point of its path is called its instantaneous velocity<br>The velocity at any instant | |
| 115. |
20t + 5t square + 3 find displacement between time 2sec and time 4sec |
| Answer» | |
| 116. |
Convert 2.91 * 10-4 radian into degree |
| Answer» | |
| 117. |
Example 4.9 of ncert |
| Answer» | |
| 118. |
a body is projected with velocity u its max. height is half the horizantal range its range will be |
| Answer» | |
| 119. |
Why do not a parabola covers straight path when it thrawn horizontally....?????? |
| Answer» ???????<br>Hichki movie dekh lo | |
| 120. |
When average velocity and instantaneous velocity are equal???????? |
| Answer» instantaneous velocity is equal to the limiting value of the average velocity of the object small time interval taken around the that instant when the time interval approach zero does instantaneous object is equal to the first order derivation of its displacement with respect to time<br>Average velocity is equal to instantaneous velocity when acceleration is zero. | |
| 121. |
Three equations of motion by graphically method |
| Answer» | |
| 122. |
Example 3.9 |
| Answer» | |
| 123. |
If linear momentum of a body increase by 40%.find %change in their K.E |
| Answer» | |
| 124. |
Need ncrt solution |
| Answer» NCERT solutions are: https://mycbseguide.com/ncert-solutions.html<br>Is aap me jao yaar<br>Google pr search kar lo mil jayega.... Bhaut sari sits h.... Jis se thik lage kar lena ... | |
| 125. |
Cbse ful solve question paper from 2015-2019 |
| Answer» See on google ...............?? | |
| 126. |
Gross error formulaa |
| Answer» Uppar niche send ho gaya<br>Of the apparatus.No corrections can be applied for gross error....Are you satisfy with me follow on my instagram shubhammmaurya9936For more question<br>These errors are due to either carelessness of person or due to improper adjustment | |
| 127. |
If an atom is war enlarged to the size of the earth 10 ki power 7 M how large would its nucleus be |
| Answer» What\'s the answer?? Pls share if u have it | |
| 128. |
If an atom is very large to size of the earth 10 power 7 a.m. how large its nucleus be |
| Answer» | |
| 129. |
What is body and particle in motion |
| Answer» | |
| 130. |
A° and A.U differ |
| Answer» A° is the angstrom which is used to measure the length 1A°=1×10^-10.And A.U means Astrnomical unit is a unit which is generally used in nano meter. | |
| 131. |
Is 4π sr and dA/r^2 is same or different |
| Answer» Same. | |
| 132. |
What is instantinous velocity and its derivation. |
| Answer» | |
| 133. |
Difference between average acceleration and instantaneous acceleration |
| Answer» Average acceleration is the change of velocity over a period of time. Instantaneous acceleration is the change of velocity over an instance of time. | |
| 134. |
Percentage relative error in 9.89 g ? |
| Answer» | |
| 135. |
Explain the motion of projectile when fixed making an theta with horizontal |
| Answer» When the motion is said to be projected with hotizontal and it make the angle say € or theta it has different thing likeRANGE= U SQUARE COS 2€/g=gravition .This is in horizontal direction when acceleration =0 and in Y=axis there is time of flight and Hmax...T=2ucos€/gHmax=Usquare COS square €/g | |
| 136. |
Universal law of gravitation is assumption or hypothesis? |
| Answer» Ok<br>Ayush I have explained the question asked by u in the below chat<br>Kaha padhti ho maheswari.<br>Always attract massive object.Gmi.m2/r^2<br>Hypothesis No law can be proved only it can be verified. | |
| 137. |
Differentiation of y = log sin cos x^3 |
| Answer» Y=1/X -COSX SINX 3X ^2<br>1 wale ka 8+-0.16 hoga na<br>1 min ruko.<br>Ayush vo 1st wale ka 6 ± 0.16 ya 8 ± 0.16??<br>I have solved just now and I am getting the same answer your sir gotSorry for the inconvenience<br>Tnku for helping me in my homework manish and ayush ??<br>Hmmmmmmmmmmmmm<br>I will ask him<br>Yes it\'s ok never mind<br>Oooo.<br>It\'s ok<br>Ek baar sir se confirm kr lo tmhara answer abhi bhi sahi nahi hai ku ki cos^3(x) raheta tb 3 bahar aa kr multiply ho jata lakin tmhara question me cos x^3 hai or x jo hai wo ek angle hai or cos ka function hai isliye cos x^3 ka differentiation-sin x^3 hogaBecause differentiation of cos x is - sin x<br>Sorry according to your question my answer is incorrect because I have solved for cos cube x not for cos x to the power 3 so your sir is right<br>Meko bhi wai lag raha hai.<br>My sir told me it will be -3x^2 sin (x^3) cot ( cos (x^3) ) are u sure manish<br>Log ka function hai sin x cos^3x is liye uska differetation hoga 1/sin xcos^3xUske baad sin(x) ka differentiation hoga cos(x) or uske baas cos^3(x) ka hoga -2sin^2(x) uske baad usko simply solve kr do aa jayega answer<br>3xlog sin cos^2 hoga.<br>Plz bta.<br>Kya hoga. Aur kaise<br>-3sin(x).sec*2(x) | |
| 138. |
Plzz i need some questions from propagation in error |
| Answer» Area = l×b hota hai na toh phir.We have l and b then l×b = 4×2+-004×004.=8+-016.Error always increase .<br>1st ka 6± 0.16 hoga na?<br>1) ka ans hoga 8+-0.16 m^2.2) ka ans hoga 4+-0.44<br>Mass = 40+-0.4g .Volume= 10+-1cm^3.Find density.?<br>Ok. Find the area of rectangle whose length is 4+-004m and breadth is 2+-004 . Find the area in proper unit. | |
| 139. |
Find the differentation of 2x^3. |
| Answer» 6x^2<br>6x²<br>d(2x^3)/dx=6x^2 [nx^y=nyx^y-1]<br>D/dx[f(x)]=f\'(x)=6x^2<br>Dx | |
| 140. |
Plzz sent me the kinematics derivation of accelerated motion |
| Answer» | |
| 141. |
Find angle between vector |
| Answer» Theta = 1/cos[a.b/lalxlbl] if u understand ?? | |
| 142. |
Define cross o fvector find A×B A=3i^+5j^and B=3j^_2k^ |
| Answer» First of all do the product the vector of A from all b vector and do similarly as from b to a then take the similar axis 0 and different axis 1. Then your answer is 25. | |
| 143. |
Derivation of all formula of motion of constant acceleration |
| Answer» From the definition of average acceleration, we have{tex}a = \\frac { d v } { d t } \\Rightarrow d v = a d t{/tex}Integrating on both sides and taking the limit for velocity u to v and for time 0 to t, we get{tex}\\int _ { u } ^ { v } d v = \\int _ { 0 } ^ { t } a d t = a \\int _ { 0 } ^ { t } d t = a [ t ] _ { 0 } ^ { t }{/tex}[a is constant]v - u = atv = u + at .....................(i)Now, from the definition of velocity, we have\xa0{tex}v = \\frac { d x } { d t } \\Rightarrow d x = v d t{/tex}Integrating on both sides and taking the limit for displacement x0\xa0to x and for time 0 to t, we get{tex}\\int _ { x _ { 0 } } ^ { x } d x = \\int _ { 0 } ^ { t } v d t = \\int _ { 0 } ^ { t } ( u + a t ) d t = v _ { 0 } [ t ] _ { 0 } ^ { t } + a \\left[ \\frac { t ^ { 2 } } { 2 } \\right] _ { 0 } ^ { t }{/tex}x - x0\xa0= ut +\xa0{tex}\\frac 12{/tex}at2x = x0\xa0+ ut +\xa0{tex}\\frac 12{/tex}at2 ..........................(ii)Now, we can write{tex}a = \\frac { d v } { d t } = \\frac { d v } { d x } \\frac { d x } { d t } = v \\frac { d v } { d x }{/tex}\xa0or vdv = adxIntegrating on both sides and taking the limit for velocity u to v and for displacement x0 to x, we get{tex}\\int _ { u } ^ { v } v d v = \\int _ { x _ { 0 } } ^ { x } a d x{/tex};\xa0{tex}\\frac { v ^ { 2 } - u ^ { 2 } } { 2 } = a \\left( x - x _ { 0 } \\right){/tex}v2\xa0= u2\xa0+ 2a(x - x0) ........................(iii)Equations (i), (ii) and (iii) are the required equations of motion. | |
| 144. |
Name the situation when v >0, a |
| Answer» When applying brakes on car | |
| 145. |
What is slope ? |
| Answer» The slope of a line is a number that describes both the direction and the steepness of the line. | |
| 146. |
What is differentation of motion. |
| Answer» V(t)=dx/dta(t)=dv/dt | |
| 147. |
What is meant by parallax and parallactic angle |
| Answer» Parallax is the apparent distance of the position of an object with respect to another when we shift our eye sideways. This method is useful to find the distance of different planets from the earth.The angle made by the points A & B with any planet is said as parallactic angle. | |
| 148. |
My question is what is concept of error in chapter units and measurements . |
| Answer» To find the error in measurement.Two types of error. 1 systematic and 2 is random .1 systematic error in this error we know the causes of error, we modify or innovate the error by adding or subtract of measurement.2is random in this we don\'t know the cause of error. We modify this increase the no. Of measurement. | |
| 149. |
I want spherometer practical |
| Answer» | |
| 150. |
Why frictional force is independent of area of contact |
| Answer» {tex}\\begin{array} { l } { F _ { \\mathrm { f-static } } \\leq \\mu _ { s } N } \\\\ { F _ { \\mathrm { f-kinetic } } = \\mu _ { k } N } \\end{array}{/tex}Notice that both of these friction formulas ONLY depend on the coefficient of friction and the normal force. It does not depend the area of contact, it doesn\'t depend on the sliding speed. | |