PhysicalGeneral Knowledge Teaching Exams State Level Railways SSC Computer Skill English Speaking/Wr

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Question1) The energy by virtue of its position is known as:


[A] Kinetic energy

[B] Potential energy

[C] Internal energy

[D] Heat energy



Option- ['A', 'B', 'C', 'D']

Answer: B

Explaination: Correct Answer: B [Potential energy]


Notes:

The energy by virtue of its position is known as Potential energy. The energy by virtue of its motion is known as Kinetic energy.




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Question2) 42.What should be the angle between force and displacement for maximum work to be done?


[A] 0°

[B] 90°

[C] 180°

[D] 30°



Option- ['A', 'B', 'C', 'D']

Answer: A

Explaination: Correct Answer: A [0°]


Notes:

For maximum work, the angle between force and displacement should be 0°. W = Fs Cos 0° = Fs For zero work, the angle between force and displacement should be 90°. W = Fs Cos 90° = 0



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Question3) 43.An orbital velocity of a satellite does not depend on which of the following?


[A] Radius of the planet

[B] Mass of the planet

[C] Radius of orbit

[D] Mass of the satellite



Option- ['A', 'B', 'C', 'D']

Answer: D

Explaination: Correct Answer: D [Mass of the satellite]


Notes:

An orbital velocity of a satellite does not depend on the mass of the satellite. It depends on the mass and radius of the planet around which it is orbiting. Also, it depends on the radius of the orbit or the height of the satellite.



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Question4) 44.By how much times the orbital speed of a satellite needs to be increased to make it escape the gravitational field?


[A] √3 times

[B] 4 times

[C] 2 times