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InterviewSolution
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.
| 13751. |
State Newton's 3rd Law of Motion. Explain(1) Why a gun recoils back.(ii) How boat is pushed back when a man jumps from the boat ? |
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Answer» Newton's third lawis: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object i) Thisrecoilis the result of action-reaction force pairs. A gunpowder explosion creates hot gases that expand outward allowing therifleto push forward on the bullet. Consistent withNewton's third lawof motion, the bullet pushes backwards upon the rifle. ii)Theman jumpsout from theboat, tojumpouthehas topushhimself upward whilepushinghimself upward hehas to exert an amount of force to lift himself up. This upward force creates an equal and opposite force in downward direction which causes the boatto move backward. |
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| 13752. |
gnitude of sum of two vectors is equal tothe magnitude of difference of the two vectors, theangle between these vectors is [NEET-2016(1) 180°(3) 90(2) 0(4) 45° |
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Answer» option 3 |
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| 13753. |
The value of angle of dip at the earth's magnetic pole is -(A) 0°(B)(C) 90°(D)45°180° |
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Answer» Let us begin with the definition of magnetic dip.Magnetic dip or magnetic inclination at a place is defined as the angle which the direction of the total strength of the earth’s magnetic field makes with horizontal line in magnetic meridian . It is represented by the symbol δ. Dip circle is the instrument used for measuring the value of magnetic dip. At different places on the surface of the earth δ is different. At the two magnetic poles, the magnetic needle rests vertically. Therefore , angle of dip at the two poles is 90°. On the magnetic equator, the angle of dip is 0 as the needle would rest horizontally at the magnetic equator. At other places the value of dip angle lies between 0 and 90 degrees. Therefore, the angle of dip from equator to the poles varies from 0° to 90°. (A) is correct option it is 90 degree, at the north poke and -90degree at the south pild option c 90° is the right answer (C)it's 90 ° at either pole north or south |
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