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Pick out the two scalar quantities in th...

Pick out the two scalar quantities in the following list : force , angular momentum , work current , linear momentum , electric field , average velocity , magnetic moment , relative velocity.

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Work , current
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A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field vecE. Due to the force q vecE, its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more second under the influence of this filed. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively,

An accelration produces a narrow beam of protons, each having an initial speed of v_(0) . The beam is directed towards an initially uncharges distant metal sphere of radius R and centered at point O. The initial path of the beam is parallel to the axis of the sphere at a distance of (R//2) from the axis, as indicated in the diagram. The protons in the beam that collide with the sphere will cause it to becomes charged. The subsequentpotential field at the accelerator due to the sphere can be neglected. The angular momentum of a particle is defined in a similar way to the moment of a force. It is defined as the moment of its linear momentum, linear replacing the force. We may assume the angular momentum of a proton about point O to be conserved. Assume the mass of the proton as m_(P) and the charge on it as e. Given that the potential of the sphere increases with time and eventually reaches a constant velue. The limiting electric potential of the sphere is

An accelration produces a narrow beam of protons, each having an initial speed of v_(0) . The beam is directed towards an initially uncharges distant metal sphere of radius R and centered at point O. The initial path of the beam is parallel to the axis of the sphere at a distance of (R//2) from the axis, as indicated in the diagram. The protons in the beam that collide with the sphere will cause it to becomes charged. The subsequentpotential field at the accelerator due to the sphere can be neglected. The angular momentum of a particle is defined in a similar way to the moment of a force. It is defined as the moment of its linear momentum, linear replacing the force. We may assume the angular momentum of a proton about point O to be conserved. Assume the mass of the proton as m_(P) and the charge on it as e. Given that the potential of the sphere increases with time and eventually reaches a constant velue. If the initial kinetic energy of a proton is 2.56 ke V , then the final potential of the sphere is

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An accelration produces a narrow beam of protons, each having an initial speed of v_(0) . The beam is directed towards an initially uncharges distant metal sphere of radius R and centered at point O. The initial path of the beam is parallel to the axis of the sphere at a distance of (R//2) from the axis, as indicated in the diagram. The protons in the beam that collide with the sphere will cause it to becomes charged. The subsequentpotential field at the accelerator due to the sphere can be neglected. The angular momentum of a particle is defined in a similar way to the moment of a force. It is defined as the moment of its linear momentum, linear replacing the force. We may assume the angular momentum of a proton about point O to be conserved. Assume the mass of the proton as m_(P) and the charge on it as e. Given that the potential of the sphere increases with time and eventually reaches a constant velue. One the potential of the sphere has reached its final, constant value, the minimum speed v of a proton along its trajectory path is given by

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NCERT GUJARATI-MOTION IN A PLANE-EXCERCISES
  1. State , for each of the following physical quantities , if it is a s...

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  2. Pick out the two scalar quantities in the following list : force , ang...

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  3. Pick out the only vector quantity in the following list : Temperature ...

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  4. State with reasons , whether the following algebraic operations with s...

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  5. Read each statement below carefully and state with reasons , if it is ...

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  6. Establish the following vector inequalities geometrically or otherwise...

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  7. Given a+b+c+d=0 , which of the following statements are correct (...

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  8. On an open ground , a motorist follows a track that turns to his left ...

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  9. A passenger arriving in a new town wishes to go from the station to a ...

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  10. Rain is falling vertically with a speed of 30 ms^(-1) . A woman rides ...

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  11. A man can swim with a speed of 4.0 km/h in still water . How long doe...

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  12. In a harbour , wind is blowing at the speed of 72 km/h and the flag on...

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  13. The celling of a long hall is 25 m high What is the maximum horizontal...

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  14. A cricketer can throw a ball to a maximum horizontal distance of 100 m...

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  15. A stone tied to the end of astring 80 cm long is whirled in a horizon...

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  16. An aircraft executes a horizontal loop of radius 1.00 km with a steady...

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  17. Read each statement below carefully and state , with reasons , if it i...

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  18. The position of a particle is given by r=3.0hati-2.0t^(2)hatj+4.0...

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  19. A particle starts from the origin at t=0 s with a velocity of 10.0hatj...

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  20. hatiandhatj are unit vectors along x - and y- axis respectively . What...

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