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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.
| 4651. |
What is Magnetic pole strength formula |
| Answer» Pole strength is defined as the strength of a magnetic pole so as to attract magnetic materials towards itself. Pole strength is a scalar quantity.\tSI unitN.Tesla-1Dimensions[LA]\tFormula P = W/ IWhere,\tP is the Strength of the magnetic pole\tW is the work done while moving the magnet around the wire\tI is the electric current in the wire | |
| 4652. |
Time period for shm |
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Answer» T= 2pi under root m / K WhereT is the time period m is the oscillating mass of the body K is the constant 1/2pi root l/g |
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| 4653. |
Construction of barometer. |
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| 4654. |
Mayer\'s formola ? |
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Answer» Mayor \'s Relationship:By using 1st law of thermodynamics,dQ=dU + pdvIf specific heat of a gas at constant volumeC = (dQ / dT)C = dU / dT ...................(1 )If specific heat capacity at constant pressureC = (dQ / dT)C = dU + Pdv / dTC = dU / dT + P(dV / dT)C C + Pdv / dT (using 1 ) ........................(2)By applying ideal gas equation for 1 molePV = nRTPV = (1)RTPV = RTP dv / dt = R dT / dtPdv = RdTP(dv / dT) =RPutting dis value in eq 2nd we get,C - C = R CP-CV=R |
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| 4655. |
Gravitation chapter how to prepare for exam |
| Answer» Visit your notes | |
| 4656. |
Why ship appear dowmward |
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| 4657. |
Explain theoretically stress strain curve |
| Answer» \tIt is a curve between stress and strain.\tA graph is plotted between the stress (which is equal in magnitude to the applied force per unit area) and the strain produced.\tThe graph helps us to understand how a given material deforms with increasing loads.\tThe curve between O and A, is a straight line. This means stress is directly ∝ to strain. In this region Hooke’s Law is applicable.\tIn this region the material behaves like an elastic body.\tIn the region from A to B, stress and strain are not directly ∝. But still the material returns to its original dimension after the force is removed. They exhibit elastic properties.\tThe point B in the curve is known as yield point (also known as elastic limit) which means till this point the material will be elastic in behaviour and the stress corresponding to point B is known as yield strength (Sy) of the material.\tThe region between O and B is called as Elastic region.\tFrom point B to point D we can see that strain increases rapidly even for small change in stress.\tEven if we remove the force the material does not come back to its original position. At this point stress is zero but strain is not zero as body has changed its shape.\tThe material has undergone plastic deformation.\tThe material is said to be permanent set.\tThe point D on the graph is known as ultimate tensile strength (Su) of the material.\tFrom D to E we can see that stress decreases even if strain increases.\tFinally at point E fracture occurs. This means the body breaks.\xa0 | |
| 4658. |
Poiseuille formula with derivation |
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| 4659. |
What is called marginal friction |
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| 4660. |
What is rocket propulsion |
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| 4661. |
Write the differences between conservative force and non-conservative force. |
| Answer» \tConservative forceNon-conservative forceA force is said to be conservative if the work done by or against force is dependent only on the initial and the final position of the body and not on the path followed by the body.A force is said to be non-conservative if the work done by or against the force is dependent on the path followed by the body.Work done by the conservative force in a closed path is zero.Work done by the non-conservative force in a closed path is not zero.Eg: Gravitational force, magnetic force, electrostatic force, etcEg: friction, viscous force, induction force in cyclotron, etc.\t | |
| 4662. |
Explain briefly, how will you find the work done by a variable force? |
| Answer» Work done by a variable force\tThe variable force is more commonly encountered than the constant force.\tIf the displacement Dx is small, we can take the force F (x) as approximately constant and the work done is then\tDW =F (x) DxFor total work, we add all work done along small displacements.\xa0 | |
| 4663. |
What is meant by conservative force ? |
| Answer» A force is conservative if the work done by force is dependent on the initial and final position of the body. | |
| 4664. |
What\'s the way to study physics easily and to get good marks |
| Answer» Just make physics your regular subject.Do its numericals on daily bases. Put your full concentration in class what is saying.note down imp.equations in a separate notebook.just do smart study with hard work | |
| 4665. |
Bernoli theorm |
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Answer» Bernoulli’s principle states thatThe total mechanical energy of the moving fluid comprising the gravitational potential energy of elevation, the energy associated with the fluid pressure and the kinetic energy of the fluid motion, remains constant. According to Bernaulli theorem the sum of total energy possessed by liquid will be conserve. This theorum is basically based on conservation of energy |
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| 4666. |
What is the gravitational field? |
| Answer» The space in the surrounding of any body in which its gravitational pull can be experienced by other bodies is called gravitational field. The gravitational force acting per unit mass at Earth any point in gravitational field is called intensity of gravitational field at that point. | |
| 4667. |
Define axis of rotation |
| Answer» The axis about which a body rotates is called the axis of rotation. | |
| 4668. |
What is Magnus effect in short |
| Answer» Magnus Effect \tDynamic lift by virtue of spinning is known as Magnus effect.\tMagnus effect is a special name given to dynamic lift by virtue of spinning.\tExample:-Spinning of a ball.\tCase1:-When the ball is not spinning. The ball moves in the air it does not spin, the velocity of the ball above and below the ball is same.As a result there is no pressure difference.(ΔP= 0).Therefore there is no dynamic lift.\t\t | |
| 4669. |
Story on gravitation |
| Answer» when ise Newton second law of Apple tree Apple suddenly fall on Isaac Newton then he in dilemma what happened why this apple fall on me this short story create the discovery of gravity or gravitation whether the body is small or big creator attractive force that is called gravitational force or gravity it is weak force in nature | |
| 4670. |
Find the integral of dx |
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| 4671. |
Can u plz tell the observation of beam balance |
| Answer» ? | |
| 4672. |
Project on projectile class 11 physics pdf |
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| 4673. |
Moment of force |
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| 4674. |
Hook\'s law... |
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Answer» ~; If the deformarion is small, the stress in a body is proportional to the corresponding strain is kmnown as Hooke\'s Law.~; Within elastic limit : stress directly proportional to steain.~; stress/ strain = constant. ~; The modulus of the elasticuty depends in the type of material temperature and impurity. It does not depend upon the values of stress and strain. Within the elastic limit strees is directly proportional to strain |
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| 4675. |
Newton\'s law |
| Answer» There are three types of law | |
| 4676. |
Escape speed |
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Answer» Minimum velocity to escape the gravitational force of Earth It\'s the min. Velocity required to escape from the gravitational field of earth Ve for earth is 11.2km/s (ignoring the air resistance) |
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| 4677. |
Physics is a |
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Answer» Physics is study of nature Subject which can be read by only the students of science ???? |
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| 4678. |
Show that time of acent equal to time of decent. |
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| 4679. |
Derived an equation for time of acent of the projectile |
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| 4680. |
An ideal engines works between t1 & t2 is used to drive an ideal refrigerator.find ratio of heats |
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| 4681. |
What are the uses of polar satellites? |
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Answer» It is used during wars, disaster and for communication It is use military purpose |
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| 4682. |
Find the centre of mass of a uniform L-shaped lamila as shown in the fig. The mass of lamila is 3kg |
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| 4683. |
Find the height of atmosphere |
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| 4684. |
What is the young modules |
| Answer» Young’s Modulus\tYoung’s modulus is derived from the name of the scientist who defined it.\tIt is the ratio of longitudinal stress to longitudinal strain.\tIt is denoted by Y.\tMathematically:\tY= longitudinal stress/ longitudinal strain = σ/ ε\t= (F/A)/ (ΔL/L)\tY=FL/ΔL\tIf Young’s modulus is more, to produce a small change in length more force required.\tS.I. Unit is N m–2 or Pascal (Pa).\tMetals have comparatively greater Young’s Modulus. To change the length of metals, greater force is required. | |
| 4685. |
State newton\'s shell theorem for the gravitational force |
| Answer» It states that the gravitational field outside a spherical shell having total mass M is the same as if the entire mass M is concentrated at its centre (centre of mass). And the gravitational field inside a spherical shell is zero. | |
| 4686. |
What is parallel axis theoram? |
| Answer» The theorem of parallel axis states that the moment of inertia of a body about an axis parallel to axis passing through centre of mass is equal to the sum of the moment of inertia of body about an axis passing through centre of mass and product of mass and square of distance between the two axes. | |
| 4687. |
Practical nahi hai kya es app main |
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Answer» Nopes No |
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| 4688. |
What is abcos90° |
| Answer» 0 | |
| 4689. |
V1= m1-m2 × u1 ------ |
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| 4690. |
Steam at hundred degree Celsius causes more severe burns than water at hundred degree Celsius |
| Answer» Yes because steam have more heat tjan water i.e. latent heat of vapourization | |
| 4691. |
Why cooling effect is produced during evaporation |
| Answer» Bcz heat is released from the reaction ..Like petroleum put on our hand after sometime it evouprate from the hand and we feel cool | |
| 4692. |
No work has to be done to vaporize the substance then to melt it why |
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| 4693. |
Application of total internal reflection |
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| 4694. |
Optics |
| Answer» 11 class main nahi hai | |
| 4695. |
Find out moment of inertia of a solid cylinder through its centre |
| Answer» L2 = 3R2as\xa0MI of a solid cylinder about its own axis is ½ MR2and\xa0MI about an axis passing through its centre of gravity and perpendicular to its length isM(L2/12 + R2/4)\xa0½ MR2\xa0=\xa0M(L2/12 + R2/4)R2/2 =\xa0L2/12 + R2/4R2/2 – R2/4\xa0= L2/12L2\xa0= 3R2L1/2\xa0= 31/2\xa0R | |
| 4696. |
Dimensions of force |
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Answer» Force=Mass*Acceleration =[M]*[LT-2] =[MLT-2] MLT-2 |
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| 4697. |
What is work give standard definition. |
| Answer» Work is a scalar product of force and displacement.. | |
| 4698. |
Vactor |
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Answer» It is a physical quantity having both magnitude and direction and obeys the parallelogram law of addition Nice Physical quantity having magnitude and direction is vector. |
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| 4699. |
Which has more molecules : 1 kg of hydrogen or 1 kg of oxygen? |
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Answer» 1 kg of hydrogen becoz it has small no. Of atom particles Oxygen |
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| 4700. |
What is the ratio of velocities of particle in SHM at x=A/3 and x=2A/3 |
| Answer» 1:5^1/2 | |