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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.
| 5701. |
Q.A standard metre is equal to K wavelength in vacuum,of the radiation from krypton 86,where K is |
| Answer» c | |
| 5702. |
If momentum is increse by50%what is its kinetic energy |
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| 5703. |
What is vector form? |
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| 5704. |
Show that Newton\'s second law is true |
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| 5705. |
Full information aboutz distance and displacement |
| Answer» Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion.Distance is the length covered .with respect to time.Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object\'s overall change in position.Displacement can be zero. | |
| 5706. |
Derive an expression for centripetal acceleration in Uniform Circular motion. |
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Answer» Centripetal acceleration =V^2/r=aWe know that F=Ma So F=MV^2/r ac=v^2/r ac=mv^2/r |
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| 5707. |
A body of maas moving in class rcular motion what is work done by it in 3/4 of it\'s rotation |
| Answer» Work done is 0.Since the angle is 90 between centripetal force and displacement. | |
| 5708. |
What is viscous force |
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Answer» It is a for ce of resistance between two distinct layer of fluid Frictional force exerted by fluids is called viscous force??? |
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| 5709. |
What is banking of circular road |
| Answer» On the circular turns the outer edge of the road is kept higher than the inner edge such roads are called banked roads. banking of roads helps the vehicles to cross the turn safely because by banking of roads the component Rcos thita of normal reaction R starts acting towards centre of circular track which provides the vehicle required centripetal force | |
| 5710. |
Banking of circular road |
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| 5711. |
Can the center of mass lie at the center |
| Answer» Center of mass lie at where the whole mass of the concentrated. So, it is not important that mass lies at center of the body | |
| 5712. |
Why electromagnetic wave doesn\'t require any medium? |
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| 5713. |
What is advantage of center of mass |
| Answer» The center of mass is a useful reference point for calculations in mechanics that involve masses distributed in space, such as the linear and angular momentum of planetary bodies and rigid body dynamics. In orbital mechanics, the equations of motion of planets are formulated as point masses located at the centers of mass. The center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero, or the point where if a force is applied it moves in the direction of the force without rotating. | |
| 5714. |
Definition of viscous force |
| Answer» Frictional force exerted by fluid b. w two layers called viscous Force | |
| 5715. |
Definition of parsec |
| Answer» It is defined as the distance suspended by the arc equivalent to mean radius of earth\'s orbit at the angle of 1" | |
| 5716. |
Please provide solved last question paper |
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| 5717. |
What is instantaneous speed and velocity |
| Answer» Instantaneous velocity is defined as the rate of change of position for a time interval which is very small (almost zero). We know that the average velocity for a given time interval is total displacement divided by total time.It is vector quantity.Velocity (v) = ds/dtInstantaneous Speed : the average speed is for a given time interval is total distance travelled divided by the total time taken, we can also say that instantaneous speed at any given time is the magnitude of instantaneous velocity at that time.It is scalar quantity.Speed(s) = ds/dt | |
| 5718. |
How we can calculate the angle if [email\xa0protected]=4 |
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| 5719. |
The potential energy of a spring |
| Answer» {tex}\\eqalign{ & PE = 0 \\cr & PE = {1 \\over 2}k{x^2} \\cr} {/tex}Potential energy stored in spring is as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.Potential energy is zero for unstretched spring. | |
| 5720. |
What do you mean by resolution of vector???? |
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Answer» Breaking a vector in two perpendicular direction Breaking of vector into it\'s components Resolution of vector means divide vector into two direction |
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| 5721. |
What is firition |
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Answer» Opposing force Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.Friction is the resistance to motion of one object moving against another. Friction is what causes fire to start when you rub two sticks together. |
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| 5722. |
What is triangle method of vector addition ?? |
| Answer» If two vectors are represented in both magnitude and directions by the two sides of the triangle then the resultant vector represented in magnitude and direction by the third side of triangle | |
| 5723. |
Explain Relative Velocity in two Dimensions. |
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| 5724. |
Derive the nth equation of motion using dimensions |
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| 5725. |
How does the orbital velocity of a satellite depend on the mass of the satellite? |
| Answer» Because of centripetal force | |
| 5726. |
Variation of acceleration due to gravity due to latitude |
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| 5727. |
Can a body has zero velocity but yet possess acceleration explain with example |
| Answer» Acceleration due to gravity. When the ball is thrown upwards at highest point v becomes 0 but still g acts onit | |
| 5728. |
Derivation of law of gravitation |
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| 5729. |
Why does a cyclists bend inwards from vertical position while taking a turn |
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| 5730. |
What is the difference between uniform and constant |
| Answer» Uniform means “same value at all points.” In the case of acceleration or velocity, if they are constant, they are uniform. (In contrast, the temperature in a room may be warmer near the ceiling, so it\'s non-uniform, but if the temperature at each point didn\'t change, it\'s constant. | |
| 5731. |
A light body and a heavy body have same momentum which one has greater k.e |
| Answer» light body | |
| 5732. |
ifloss of kinetic energy of a body is 50% then find out loss in momentum |
| Answer» Loss of kinetic energy=200 \'/, | |
| 5733. |
Equation of motion for the centre of mass |
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| 5734. |
Define contact force? |
| Answer» A contact is that force which requires physical contact to enforced (ex:-muscular force) | |
| 5735. |
State the principle of cricket propulsion and deduce the expression for the acceleration |
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| 5736. |
what is electromegnetic force |
| Answer» Electromagnetic Force:It is a type of physical interaction that occurs between electrically charged particles .A fundamental force in nature, the electromagnetic force(electrostatic force) acts between charged particles and is the combination of all electrical and magnetic forces.For example, the electromagnetic force holds atoms together in molecules, causes friction, and attracts iron to a magnet. | |
| 5737. |
Why boat not sink in water |
| Answer» When an object enters water, two forces act upon it. There\'s a downward force (gravity) that\'s determined by the object\'s weight. There\'s also an upward force (buoyancy) that\'s determined by the weight of the water displaced by the object. An object will float if the gravitational (downward) force is less than the buoyancy (upward) force. So, in other words, an object will float if it weighs less than the amount of water it displaces.A huge boat will float because, even though it weighs a lot, it displaces a huge amount of water that weighs even more. Plus, boats are designed specifically so that they will displace enough water to assure that they\'ll float easily. | |
| 5738. |
Coefficient of restriction |
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| 5739. |
What kind of motion can a rigid body have? |
| Answer» Rotational motion | |
| 5740. |
Why physics is the content of maths |
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| 5741. |
Why earth is round |
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Answer» In universe anything which radius is more than 300m are spherical in shape , it is becz increase in mass cause high force of attraction and all things are get attracted towards center and form spherical shape (except asteroid or other which allows collides with each other causes different shapes) Earth is not round. It is ovule shaped |
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| 5742. |
Dimensinof velocity gradient |
| Answer» Velocity Gradient is defined as rate of change in velocity per unit of distance.\xa0Velocity Gradient= velocity/distance.Dimensional Formula of velocity= M0L1T-1Dimensional Formula of Velocity Gradient = M0L0T-1SI unit of Velocity Gradient is s-1 | |
| 5743. |
Stress and strain curve |
| Answer» Stress- Strain Curve :It is a curve between stress and strain. A graph is plotted between the stress (which is equal in magnitude to the applied force per unit area) and the strain produced.The graph helps us to understand how a given material deforms with increasing loads.The curve between O and A, is a straight line. This means stress is directly ∝ to strain.In this region Hooke’s Law is applicable.In this region the material behaves like an elastic body.In 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. | |
| 5744. |
Why do we need unit for measurement |
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Answer» \tKnowing the units of measurement that correspond with a number can give you so much more information than a digit sitting there by itself.\tHelp to show another person the exact amount you have\tAssist in solving a mathematical problem, especially in chemistry, where you can follow the units to get to the answer\tShow which measurement system the person is using (i.e. metric or standard). Knowing the units of measurement that correspond with a number can give you so much more information than a digit sitting there by itself. Units can:\tHelp to show another person the exact amount you have;\tAssist in solving a mathematical problem, especially in chemistry, where you can follow the units to get to the answer;\tShow which measurement system the person is using (i.e. metric or standard).In a nutshell, the unit of measurement in science serves as the supporting pillar upon which a number rests. |
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| 5745. |
Why is pull easier than to push |
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| 5746. |
Why is pull easier than push? |
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| 5747. |
Important question from all chapter |
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| 5748. |
Elastic fatique |
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| 5749. |
Why spinning bullet comes out from the gun barrel |
| Answer» The internal part of gun\'s barrel is spiral in shape cause spinning of bullet for excess damage to foe | |
| 5750. |
Why is it easier to balance a moving bicycle |
| Answer» 1. The wheels of the bicycle each have their own angular momentum vectors, which like to stay pointed in the same direction, and hence resist tipping from side to side .2. Since the\xa0bicycle is moving, any tipping to one side or the other can easily be corrected by turning the front wheel slightly to one side and getting a mv2/r force that will tend to counteract the tipping. The greater the velocity, the bigger this force is.\xa0 | |