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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.
| 4751. |
Define tension |
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Answer» Tension is a type of force that always acts outwards to the surface.It always apply in the case of string ,rod,chain etc. Tension may also be described as the action-reaction pair of forces acting at each end of the said elements. Tension could be the opposite of compression. |
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| 4752. |
find mass of earth , given that radius of earth R= 6400 km, g = 9.8m/s ,G= 6.67×10 |
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| 4753. |
Find the centre of mass in the letter F |
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| 4754. |
Why second law is called real law of motion? |
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Answer» Second law is real law because with the help of second law we can proof 1st as well as 3rd law of motion. Why is Newton\'s 2nd law called the Real Law of Newton? Which states that there will be no acceleration in the body if no external force is applied on it.This means that a body in rest will remain at rest and a body in uniform motion will remain in uniform motion which is also stated in Newton\'s 1st law. |
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| 4755. |
Why does a cricket player lower his hand while catching a cricket ball? |
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Answer» By lowering his hands down, the cricket player increase the time of force act on his hands .As force and time are related inversly ( force = impulse/time) so the cricketer hurt less??? In order to increase the time period so that the momentum of the ball falls to zero and the ball does not harm to our hand. |
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| 4756. |
Uses of moon? |
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Answer» Ok Plz check your question |
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| 4757. |
Difference between gravitational mass and inertial mass |
| Answer» \t\tGravitational mass\xa0is measured by comparing the force of gravity of an unknown mass to the force of gravity of a known mass.\t\t\tInertial mass\xa0is found by applying a known force to an unknown mass, measuring the acceleration, and applying Newton\'s Second Law, a = F/m.\t | |
| 4758. |
Si unit of meter |
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Answer» M M |
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| 4759. |
What is the difference between tension, tensor,tensile? |
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| 4760. |
How much below the surface of Earth |
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| 4761. |
Energy conservation in spring mass system |
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| 4762. |
Prove momentum conservation with an example |
| Answer» Law of conservation of momentum states thatFor two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.Law of Conservation of Momentum ExamplesFollowing are the examples of law of conversation of momentum:\tAir filled balloons\tSystem of gun and bullet\tMotion of rockets | |
| 4763. |
Find the Percentage error in resistance (R) when V= 100+-5V and I= 100+-0.2A |
| Answer» 5.2% | |
| 4764. |
Which of the following are not a unit of time a. second b. parsecond c. microsecond d.year |
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Answer» Parsecond as it is defined as parsec in short form which is unit of length it is the distance at which an arc of length of 1AU subtend an angle of 1 sec at centre Parsecond |
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| 4765. |
Derivation of Newton law of motion All three law derivation |
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| 4766. |
What is the process for the liquification of gas |
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Answer» A gas can be converted into a liquid through a process called liquefaction.Liquefaction of a gas can occur only when the intermolecular force of attraction between the gas molecules are increased.Methods for liquefaction:(i) Increase in pressure of the gas at room temperature: On increasing pressure the gas molecules come closer to each other, results in an increase in the intermolecular forces of attraction between the molecules, which leads to the liquefaction of gases.(ii) Decrease in the temperature of the gas:As the gas gets cooled the kinetic energy of the gas molecules decreases, results in the decrease of the speed of their random motion and in the increase of the force of attraction between them.Carbon dioxide, ammonia, sulphur dioxide and hydrogen chloride can be liquefied by increasing the pressure and decreasing the temperature.There are some gases, which cannot be liquefied at room temperature even at very high pressure. These gases are called as permanent gases.Ex: H2, He, O2. Liquefaction of gases is the process by which substances in their gaseous state are converted to the liquid state. When pressure on a gas is increased, its molecules closer together, and its temperature is reduced, which removes enough energy to make it change from the gaseous to the liquid state. |
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| 4767. |
What is pysics? |
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Answer» Well... It\'s not more than a headache ? Physics is that branch of science which deals with study of nature Physics is the branch of science which is a devoted to the study of nature and natural phenomena |
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| 4768. |
What is the range of nuclear force\' |
| Answer» The range of the nuclear force is short, only a few femtometer (1 fm =10−15 m), beyond which it decreases rapidly. That is why, in spite of its enormous strength, we do not feel anything of this force on the atomic scale or in everyday life. The development of a proper theory of nuclear forces has occupied the minds of some of the brightest physicists for seven decades and has been one of the main topics of physics research in the 20th century. | |
| 4769. |
What is the range of nuclear force? |
| Answer» 10 power 36 | |
| 4770. |
Half yearly exam ouestion paper solve |
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| 4771. |
What is equation of trajectory??? |
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Answer» Y=xtanQ-1/2gx^2/u^2cos^2Q Y=kx*2 |
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| 4772. |
Give five sentences in which force can change the shape and size of an object. |
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| 4773. |
Varg ka Si matrak |
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| 4774. |
Derive equation of motion of rotational motion under constant angular acceleration |
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| 4775. |
Collisions in one dimension |
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| 4776. |
What is Boyle\'s temperature ? |
| Answer» Temperature at which a real gas obeys idea gas behaviour (law) over an appreciable range of pressure. | |
| 4777. |
Explain banking of track ? Derive max Speed for it |
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| 4778. |
Proof of cosine law |
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| 4779. |
Derive the path projectile |
| Answer» You can search in google | |
| 4780. |
Derive second equation of motion by graphical method? |
| Answer» Distance /displacement covered by a particle in time (t) = total area of figureS= area of rectangle OACD + area of triangle ABC S= od *oa + 1/2 ac* bcS= (t-0) * u +1/2 (t-0)* (v-u)S= t*u+ 1/2 *t*atS=ut +1/2 at2*(multiple) | |
| 4781. |
WHAT IS THE MEANING OF TMKC |
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| 4782. |
State and explain the work energy principle |
| Answer» The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force. | |
| 4783. |
State theorem of perpendicular and parallel axis |
| Answer» Let m and r be the respective masses of the hollow cylinder and the solid sphere.\xa0moment of inertia of the hollow cylinder\xa0I1\xa0= mr2The moment of inertia of the solid sphere I2\xa0{tex}= \\frac { 2 } { 5 } m r ^ { 2 }{/tex}We have the relation:{tex}\\tau = I a{/tex}For the hollow cylinder, {tex}\\tau _ { 1 } = I _ { 1 } \\alpha _ { 1 }{/tex}For the solid sphere, {tex}\\tau _ { 2 } = I _ { 2 } \\alpha _ { 2 }{/tex}As an equal torque is applied to both the bodies, {tex}\\tau _ { 1 } = \\tau _ { 2 }{/tex}{tex}\\therefore \\frac {\\alpha_ { 2 } } { \\alpha _ { 1 } } = \\frac { I _ { 1} } { I _ { 2 } } = \\frac { M r ^ { 2 } } { \\frac { 2 } { 5 } M r ^ { 2 } } = \\frac { 2 } { 5 }{/tex}{tex}a _ { 2 } > a _ { 1 }{/tex} ….(i)Now, using the relation:{tex}\\omega = \\omega _ { 0 } + a t{/tex}{tex}\\omega \\propto a{/tex} …(ii)From equations (i) and (ii), we can write:{tex}\\omega _ { 2 } > \\omega _ { 1 }{/tex}Hence, the angular velocity of the solid sphere will be greater than that of the hollow cylinder. | |
| 4784. |
Derive expression for variation of G due to altitude and depth |
| Answer» Let us consider the earth to be spherical mass of ‘M’ and radius ‘R’. A body of mass ‘m’ is placed initially on the surface and finally taken x distance deep into the earth.We know acceleration due to gravity on the surface of earth isThis expression shows that acceleration due to gravity decreases as we go deep into the earth.At the centre of earth x=R, so g’=0. Hence, the acceleration due to gravity at the centre of earth is zero (0).\xa0 | |
| 4785. |
Write expression for momentum of inertia for ring disc rod and spare |
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| 4786. |
How to learn chapter 5 in physics |
| Answer» By modern book of physics | |
| 4787. |
second law is the real law of motion |
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Answer» Hi We shall derive the 1st\xa0and the 3rdlaw of motion fron the 2nd\xa0law.|Derivation of 1st\xa0law|According to Newton’s 2\xa0nd\xa0law of motion,F = maWhere, F is the force applied, m is the mass of the body and a is the acceleration of the body.So,In absence of a force,F = 0=> ma = 0=> a = 0Since, m cannot be zero for a body.Zero acceleration means, body at rest will remain at rest and a body in uniform motion will continue its uniform motion. Which is Newton’s 1st\xa0law of motion.|Derivation of 3rd\xa0law|Consider an isolated system of two bodies A and B. An isolated system is such that no force acts on the system.This is the Newton’s third law of motion for a body exerting some force on another.Thus, Newton’s 2nd\xa0law of motion is the most basic law of motion. |
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| 4788. |
If (3i^-2j^+2k^)(2i^-xj^+3k^)=-12 then what is the value of x |
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Answer» (3*2)+(-2*-x)+(2*3)= -126+2x+6= -1212+2x= -122x= -24x= -12 12 |
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| 4789. |
What are the importance of centre of mass with examples |
| Answer» It is important because if we will balance at any other point it won\'t balance. | |
| 4790. |
bal kye hai |
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| 4791. |
State and explain that Newton\'s second law is the real law |
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Answer» Hi Newton\'s second law is a real law of motion as it implies first and third law.From newton\'s second law;F=maIf F=0 a=0Thus, says when net external force is 0,acceleration is 0.From second law;P+Pï=Fî+Fï (P is momentum of first object and Pï that of second object. Respectively is Fî and Fï ;final momenta)Then, P-Fî=Fï-Pï P-Fî=-(Pï-Fï) Ft=-(Fįt) F=-Fįwhere t is time interval, F is force on first object by second and Fį vice-versa .Thus, newton\'s third law is implied by second. Hence, second law alone is sufficient to rule the motion and is called real law of motion. |
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| 4792. |
What is centripetal Acceclation |
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Answer» Which attracts towards the centre,formula mv2/r Hey The centripetal (\'center-seeking\') acceleration is the motion inwards towards the center of a circle. Formula:The centripetal acceleration is equal to the square of the velocity, divided by the radius of the circular path.ac = v2/rWhere,ac = acceleration, centripetal, m/s2v = velocity, m/sr = radius, m☺️ |
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| 4793. |
Explain dot product and cross product of two vectors |
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Answer» the dot product is the sum of the products of the corresponding entries of the two sequences of numbers. The cross product a × b is defined as a vector c that is perpendicular (orthogonal) to both a and b, with a direction given by the right-hand rule and a magnitude equal to the area of the parallelogram that the vectors span. |
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| 4794. |
Write parallelogram of vector addition |
| Answer» It states that when a vector was on two adjacent sides of a parellalogram , the vector is described completely in daigonal | |
| 4795. |
Derivation of Triangle Law of vector addition |
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Answer» And i got 87% in 10 And please dont become oversmart No you are mental and why are you say these words Why are u so mental,what % u gain in 10 |
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| 4796. |
Discuss have error propagate in sum difference product and division of quantities |
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| 4797. |
Write triangle law of vector aaditon |
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Answer» Triangle law of vector addition states that when two vectors are represented by two sides of a triangle in magnitude and direction taken in same order then third side of that triangle represents in magnitude and direction the resultant of the vectors. Let suppose two vectors are given and we have to add it then we join it with tail to tail such that it represent the sides of a triangle then the line joining the end point of it represent the resultant sum of two vectors . The way of joining the vectors called triangle law of vector addition |
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| 4798. |
Please updet physics ncert solution vedio |
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| 4799. |
Name the scientist who introduced the concept of antiparticle |
| Answer» Paul Dirac ( 1902 – 1984 )The concept of antiparticle was first introduced theoretically by Paul Dirac (1902–1984) in 1930 and confirmed two years later by the experimental discovery of positron (antielectron) by Carl Anderson. | |
| 4800. |
Derive an expression for power in term of velocity. |
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