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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.
| 6151. |
Find the center of mass of a thin road? |
| Answer» Centre of Mass of a rod is mainly L/2, if it passes through centre of mass and is perpendicular to the plane then Moment of Inertia is ML^2/12 | |
| 6152. |
Define Angular velocity with it\'s derivation?? |
| Answer» The angular displacement coverd in per unit time is called angular velocity | |
| 6153. |
What is Reynolds number? |
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Answer» It is a dimensionless parameter which determines the nature of flow of liquid. Itbis given by=Reyonld\'s number= Density ×Velocity×Diameter÷Coefficient of viscosity It is dimensionless quantity in fluid mechanism. It helps to predect flow pattern in different fluid flow situation |
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| 6154. |
what is projrctile |
| Answer» It two dimensional motion in which acceleration acting on the body is only due to earth is called projrctile | |
| 6155. |
Connected bodies |
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| 6156. |
Derive the expression for bernauliis principal |
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| 6157. |
What is water equivalent? In physics |
| Answer» Water equivalent of a substance is the amount of water that would absorb the same amount of heat as the substance per degree rise in temperature | |
| 6158. |
Solve (1+x)3 using Binomial theorem |
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| 6159. |
A ball bounce to 80% of its original height . what fraction of its M.E is lost in each bounce |
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| 6160. |
2017-2018 mid term paper |
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| 6161. |
What is banding of road |
| Answer» Banking of roads is defined as the phenomenon in which the edges are raised for the curved roads above the inner edge to provide the necessary centripetal force to the vehicles so that they take a safe turn. | |
| 6162. |
Define movement if inertia |
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Answer» It opposed applied force or torque on a body. The moment of inertia is defined as the quantity expressed by the body resisting angular acceleration which is the sum of the product of the mass of every particle with its square of a distance from the axis of rotation. The SI unit of moment of inertia is kg m2. It is also known as the angular mass or rotational inertia. It is the sum of product of mass and square of distance from rotation of axis.....I mr square |
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| 6163. |
Evaluate î.î |
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Answer» 1 It\'s = 1. |
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| 6164. |
Numericals kitne marks ke aayege. |
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Answer» Approx 20Not more than it 15 to 18 marks may be |
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| 6165. |
Kitne chapter aa rahe hai |
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Answer» Wahhhh I love you 7 |
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| 6166. |
Sir mera kal paper hai 1 to 7 chapter aa rahe hai please important questions bata do |
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Answer» Bhai internet se dhond le na Sir mera kal paper hai 1 to 7 chapter aa rahe hai please sir important question bat do |
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| 6167. |
Oblique projectile |
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| 6168. |
Proove w=rv |
| Answer» We Know That,W =rvTherfore w = rvHence prove | |
| 6169. |
Explain heating effect in electric current |
| Answer» When electric current is supplied to a purely resistive conductor, the energy of electric current is dissipated entirely in the form of heat and as a result, resistor gets heated. The heating of resistor because of dissipation of electrical energy is commonly known as Heating Effect of Electric Current. Some examples are as follows:When electric energy is supplied to an electric bulb, the filament gets heated because of which it gives light. The heating of electric bulb happens because of heating effect of electric current.When an electric iron is connected to an electric circuit, the element of electric iron gets heated because of dissipation of electric energy, which heats the electric iron. The element of electric iron is a purely resistive conductor. This happens because of heating effect of electric current. | |
| 6170. |
Write the dimensional formula of torque |
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Answer» Work, Energy & torque .same dimentional formula ML²/T² Torque = force × perpendicular distance, Dimensional formula =MLT^-2×L =ML²T-² ML² T²– |
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| 6171. |
Which of the following is not a fundamental quantity |
| Answer» There are mainly 7 fundamental quantities ÷Mass,length,time, temperature, current, amount of substance, luminous intensity,. | |
| 6172. |
Prove that w=v |
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| 6173. |
P=m ✖ v |
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Answer» Momentum=mass x velocity Product of mass and velocity called momentum |
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| 6174. |
Explain the meaning of the following equation p= m ✖ v |
| Answer» Momentum=mass× Velocity | |
| 6175. |
3 equation of motion |
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Answer» Area of trapezium =½×(v+u)tS=½×(v+u)(v-u)/a [v-u/a =t]2as=v²-u²V²=u²+2as V²-u²=2asV=u+atS=ut+½at² V=u+at(velocity-time graph)S =ut+1/2at^2(position-time graph)V^2=u^2+2as(position-velocity graph) 1) first motion equation is v=u+at2) second motion equation is s=ut+1/2 at^23). Third motion equation is v^2=u^2+2as And with respect to gravity..v^2=u^2-2gs. V^2=u^2+2as... |
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| 6176. |
Under what condition can a object in motion be considered a point object |
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Answer» YES...WHEN OBJECT COVERS A LARGER DISTANCE THAN IT\'S OWN SIZE! When object travells distance larger than its size |
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| 6177. |
Draw free body diagram of 3 blocks |
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| 6178. |
What is Kepler law |
| Answer» Kepler’s 1st Law: Law of OrbitsStatement: - The orbit of every planet is an ellipse around the sun with sun at one of the two foci of ellipse.Kepler’s 2nd law: Law of AreasStatement:-The line that joins a planet to the sun sweeps out equal areas in equal intervals of time.Kepler’s 3rdLaw: Law of periodsStatement: -\tAccording to this law the square of time period of a planet is ∝ to the cube of the semi-major axisof its orbit. | |
| 6179. |
Find out %error of volume of cylinder if r=4% and h=6%? |
| Answer» V=πr^2hBy differentiatingdv/v=2*(dr/r)+(dh/h)Now by multiplying by 100 both side(dv/v)*100=2*(dr/r)*100+(dh/h)*100 %error in v=2*4%+6%=14% | |
| 6180. |
Explain work energy theorem |
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Answer» W=½v²-½u² It states that the work done by an object is the change in kinetic energy of the body i.e. difference in final KE and inital KE.W=1/2mv^2-1/2mu^2W=1/2m(v^2-u^2)Hope you got the feel of the topic. Work done by a force on a body is equal to the change in the kinetic energy of the bodyLet us consider a body of mass M moving with the initial velocity u and when a constant force F is applied on it its velocity become Vdw=f×dxdw=m dv/dt × dxdw=mdv(dx/dt)dw=mvdvOn integrating|dw=|mvdvW=m |vdvW=m(v2)/2W=m(v2-u2)/2W=1/2mv2-1/2mu2 |
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| 6181. |
Explain a easy method for projectile motion and kinatic equations please.. |
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| 6182. |
What is avarage force |
| Answer» Average Force is Total Force divided by Total Time. | |
| 6183. |
why projectile is in parbola not in straight line |
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| 6184. |
Name three conservation law from nature |
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Answer» 1.law of conservation of energy. 2.law of conservation of momentum. 3.law of conservation of mass Conservation Laws: A conservation law is a hypothesis based on observation and experiments which cannot be proved. These can be verified via experiments.Law of conservation of Energy: According to the general Law of conservation of energy, the energies remain constant over time and convert from one form to another. The law of conservation of energy applies to the whole universe and it is believed that the total energy of the universe remains unchanged.Under identical conditions, the nature produces symmetric results at different time.Law of conservation of Mass: This is a principle used in analysis of chemical reactions. A chemical reaction is basically a rearrangement of atoms among different molecules. If the total binding energy of the reacting molecules is less than the total binding energy of the product molecules, the difference appears as heat and the reaction is exothermic.The opposite is true for energy absorbing (endothermic) reactions.Since the atoms are merely rearranged but not destroyed, the total mass of the reactants is the same as the total mass of the products in a chemical reaction.Mass is related to energy through Einstein theory,E = mc2, c – speed of light in vacuumLaw of conservation of linear momentum: Symmetry of laws of nature with respect to translation in space is termed as law of conservation of linear momentum.Example law of gravitation is same on earth and moon even if the acceleration due to gravity at moon is 1/6th than that at earth.Law of conservation of angular momentum: Isotropy of space (no intrinsically preferred direction in space) underlies the law of conservation of angular momentum.\xa0 |
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| 6185. |
Chapter 4 example 4.3 |
| Answer» R | |
| 6186. |
What was mistake in Aristotle\'s idea regarding motion |
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| 6187. |
Three mass what magnitude 5km.10km.15km.and cordinet 134.-205.265 tack the centre |
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| 6188. |
How to find tan inverse of 31° |
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| 6189. |
What is the formula of solid angle. define. |
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| 6190. |
Four physical quantities which have the same dimensional formula..??? |
| Answer» Surface Tension[MT^-2] Surface energy[MT^-2] Spring constant[MT^-2] | |
| 6191. |
Horizontal range of a projectile |
| Answer» If u is initial velocity thrown at an angle of α then the horizontal range is {u^2 (sin α)^2}/(2g) Where g is gravitational acceleration | |
| 6192. |
Nature of physical law |
| Answer» Physical law. A physical law, scientific law, or a law of nature is a scientific generalization based on empirical observations of physical behavior. ... The production of a summary description of nature in the form of such laws is a fundamental aim of science. | |
| 6193. |
Unification of forces? |
| Answer» Newton showed celestial and terrestrial domains under a common law of gravitation Moreover Orested and Faraday unified magnetic and electric phenomenon are inseparable Therefore joining one or more theories and domains we get great advantage in phy. This is called unification of forces | |
| 6194. |
Fundamental forces in nature |
| Answer» There are following four fundamental forces in nature:(i) Gravitational forces, (ii) electromagnetic forces, (iii) strong forces or nuclear forces, (iv) weak forces. Some of the important features of these forces are discussed below:(i) Gravitational forces : These are the forces of attraction between any two bodies in the universe separated by a definite distance.(ii) Electromagnetic forces : They include the electrostatic and magnetic forces. The electrostatic forces are the forces between two static charges while magnetic forces are the forces between twomagnetic poles. The moving charges give rise to the magnetic forces. The combined action of these forces are called electromagnetic forces. Characteristics of electromagnetic forces :(i) These forces are both attractive as well as repulsive.(ii) They are central forces in nature.(iii) They obey inverse square law.(iv) They are conservative forces in nature.(v) These forces are due to the exchange of particles known as photons which carry no charge and have zero rest mass.(vi) They are 1036 times stronger as compared togravitational forces and 10u times stronger than the weak forces.(iii) Strong forces : The particles inside the nucleus are charged particles (protons) and neutral particles (neutrons) which are bounded to each other by a strong interaction called nuclear force or strong force. Hence, they may be defined as the forces binding the nucleons (protons and neutrons) together in a nucleus. These are responsible for the stability of the atomic nucleus. These are of three types:(i) n-n forces are the forces of attraction between two neutrons.(ii) p-p forces are the forces of attraction between two protons.(iii) n-p forces are the forces of the attraction between a proton and a neutron.Characteristics of nuclear forces:(i) They are basically attractive in nature and become repulsive when the distance between nucleons is less than 0.5 Fermi.(ii) They obey inverse square law.(iv) Weak forces : They are defined as the interactions which take place between elementary particles during radioactive decay of a radioactive substance. In p-decay the nucleus emits an electron and a particle called neutrino (which is uncharged). The interaction between the electron and the neutrino is known as weak interaction or weak forces. Characteristics of weak forces:(i) These are the types of forces that we encounter in macroscopic world, while.(ii) These are the types of forces that we encounter inthe microscopic world. | |
| 6195. |
What is the difference between science and technology? |
| Answer» Science means deep understanding physics, chemistry etc. | |
| 6196. |
Does physics is an exact science? |
| Answer» No nothing is exact u can say in science specially Chem. And phy. Because their are lot of assumptions that we make in n phy. And Chem. While solving the problem. If we see real life and connect it with phy. Then it would be very complicated so assumption are made | |
| 6197. |
What is the scope of physics and excitement of physics? |
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| 6198. |
Y(t)=4t3+3t2+2t+1 ,what is the value of y (0) |
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Answer» 1 2 answer How 1 |
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| 6199. |
Water contains ions of Fe. Then why is water not attracted by a magnet ? |
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| 6200. |
What Is Parabolic PATH" |
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