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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.
| 5751. |
name type of quantity of moment of inertia? |
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| 5752. |
Vt graph at graph and dt graph differences |
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| 5753. |
What is ?error |
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Answer» Difference between true value and measured value is known as error. Error in a measurement is equal to the difference between true value and the measured value of that quantity. |
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| 5754. |
What is moment of interia |
| Answer» It is the sum of the product of mass of body and square of its perpendicular distance. | |
| 5755. |
Gravitational potential energy is independent of path followed. Proof this statement |
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| 5756. |
If a player throws a ball with initial speed 29 m/s |
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| 5757. |
Differentiate between Potential and Potential energy. |
| Answer» Potential means capacity and potential energy means energy posses by a body when it is in rest | |
| 5758. |
Why does absolute zero correspond to zero energy? |
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Answer» \tAbsolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.\tAbsolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.\tBy international agreement, absolute zero is defined as precisely; 0 K on the Kelvin scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees Celsius on the Celsius scale.\tAbsolute zero is also precisely equivalent to; 0 degrees R on the Rankine scale (also a thermodynamic temperature scale); and –459.67 degrees F on the Fahrenheit scale.\tWhile scientists can not fully achieve a state of “zero” heat energy in a substance, they have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects).\tIn 1994, the NIST achieved a record cold temperature of 700 nK (billionths of a kelvin).\tIn 2003, researchers at MIT eclipsed this with a new record of 450 pK (0.45 nK).Therefore, absolute zero corresponds to the level of zero energy. At absolute zero, all motion comes to a standstill. A lower temperature is not feasible because there is no velocity smaller than zero and no energy content less than nothing. Energy in this instance means only the energy that can be taken away from the particles and does not include the rest mass or quantum mechanical zero-point energies for confined particles.That\'s why it corresponds to zero energy. Absolute zero corresponds to –273 degrees Celsius and –460 degrees Fahrenheit.Temperature: it is a measure of the energy content of matter. When air is hot, the molecules move fast and they have high kinetic energy. The colder the molecules are, the smaller their velocities are and, subsequently, their energy. |
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| 5759. |
How volume can be elastic? |
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| 5760. |
How to convert m/s into km/hr |
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Answer» By multiplying value in m/s by 5÷18 Multiply it with 3.6 |
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| 5761. |
Unit and dimensions of force constant of spring |
| Answer» F=kxso k=F/x[k]=[MLT-2]/[L][k]=[MT-2] | |
| 5762. |
Practical chat |
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| 5763. |
what is chandrashekhar maas limit? |
| Answer» The maximum limit of 1.44 times the solar mass ( for a star to end its life as a white dwarf ) is known as \'Chandrasekhar Limit\'. | |
| 5764. |
Chat of practical |
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| 5765. |
What is chandrashekhar mass limit |
| Answer» Csl= 1.4*2*10to the power 30kg =2.8*10to the power 30 kg. | |
| 5766. |
what is the value of A*A? |
| Answer» A*A=A2 | |
| 5767. |
Name the two physical quantities having the dimensions [M L 2T-2 ] |
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Answer» Work and rotational kinetic energy Moment of force and energy energy and torque |
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| 5768. |
Unstable equilibrium |
| Answer» Unstable equilibrium When the center of gravity of a body lies above the point of suspension or support, the body is said to be in unstable equilibriumExample pencil standing on its point or a stick in vertically standing position.Explanation: If thin rod standing vertically is slightly disturbed from its position it will not come back to its original position. This type of equilibrium is called unstable equilibrium, other example of unstable equilibrium are vertically standing cylinder and funnel etc. | |
| 5769. |
Stable equilibrium |
| Answer» When the center of gravity of a body lies below point of suspension or support, the body is said to be in Stable Equilibrium.For example a book lying on a table is in stable equilibrium.Explanation A book lying on a horizontal surface is an example of stable equilibrium. If the book is lifted from one edge and then allowed to fall, it will come back to its original position. Other examples of stable equilibrium are bodies lying on the floor such as chair, table etc. | |
| 5770. |
What is magnitude ? |
| Answer» Magnitude :It is the “size” of something. The word magnitude is generally used with vectors, actually means the size of the vector. i.e. The distance between the co-ordinates of the head and the tail of the vector. | |
| 5771. |
How we live on the earth and earth rotate and we don\'t fall from the earth |
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Answer» Because we are in gravitational force It is because that our gravitational force is pull us in the earth and centripetal force of earth is also responsible for It\'s all because of gravity only. Because we are connected with earth |
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| 5772. |
Why centrifugal force is also called peudo force? |
| Answer» Actually pseudo forces are those forces which do not have physical existence. Pseudo forces are applied on a body only when we analyse its motion from a noninertial frame(accelerating frames). Therefore when we take the origin in a rotating frame of reference(which is non inertial) we apply a pseudo force called centripetal force to analyse the motion. If you still don\'t get it , read \'\' concepts of physics by h c verma\'\' | |
| 5773. |
In arrangement shown in fig is in equilibrium, mass m of block is closest to |
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| 5774. |
What are the advantages of fraction and disadvantage |
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| 5775. |
What oscillator |
| Answer» it is a circuit which produces a continues,repeated,alternating waveform without any input. | |
| 5776. |
Why we call frictional force is a self adjusting force |
| Answer» Because it itself come into play when a force starts acting in a body. | |
| 5777. |
does temprature effect friction |
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Answer» Yes it effect... Friction Yes |
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| 5778. |
Where does the center of mass of a eqilateral lies |
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| 5779. |
What is Centre of mass of earth. Can anyone help me? |
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| 5780. |
give derivation for centripetal acc leration |
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| 5781. |
Is change in internal energy state function or path function |
| Answer» Internal energy is a state function. Also,change in internal energy is neither a state function nor a path function. | |
| 5782. |
Why clock will become fast in winter and slow in summer? |
| Answer» Due to equatorial reason of earth☺ | |
| 5783. |
Derive an expression for the triple product of vectors A, B and C. |
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| 5784. |
Find a relation between dot product and cross product of two vectors |
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| 5785. |
Define dot products of two vectors.write 4 properties of dot products |
| Answer» The dot product of two vectors, resulting in a scalar, is defined as the product of the magnitude of one vector by the component of the other in the direction of the first. | |
| 5786. |
How I can apply for improvement exam for 12th after 15th October. |
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| 5787. |
What is the rolling motion |
| Answer» Translatory + rotational motion=rolling motion | |
| 5788. |
What is.martial mass? |
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| 5789. |
What is gama for all gases |
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| 5790. |
Types of vector with deffinatiin |
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| 5791. |
What is hypotheses |
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| 5792. |
Derive an expression for the time period of revolution using orbital speed |
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| 5793. |
What kind of a vector a torque is |
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| 5794. |
Define si unit of resistance |
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Answer» No, ampere is the si unit of current The S.I unit of resistance is ohms. The resistance of a conductor is one ohm if an applied potential difference of one volt across it results in a current of one ampere through it. Ampere |
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| 5795. |
Define SI unit of resistence |
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| 5796. |
3.0m/s convert into km/h |
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| 5797. |
Does a wall clock gainor lose time in summer? |
| Answer» Lose time in summer | |
| 5798. |
Where is solution of sample papers??? |
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| 5799. |
Where to find online papers to solve for different subs |
| Answer» It is avaliable on exam fear. | |
| 5800. |
difference between gravitational potential and gravitational potential energy |
| Answer» Gravitational potential is the amount of work done to bringing a unit mass body (1 kg mass) from infinity to a point in gravitational field, whereas gravitational potential energy is work done on any mass (m):gravitational potential is a case of gravitational potential energy for unit mass so,W=-GMm/r..and m=1 ::W=GM/r | |