Home
Class 11
PHYSICS
An electron and a proton are detected in...

An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster, the electron or the proton? Obtain the ratio of their speeds. (electron mass `=9.11xx10^(-31)kg`, proton mass `=1.67xx10^(-27)kg, 1 eV= 1.60xx10^(-19)J`).

Text Solution

Verified by Experts

The electron is faster, `v_(e )"/"v_(p)= 13.5`
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    NCERT BANGLISH|Exercise EXERCISES (ADDITIONAL EXERCISES)|6 Videos

  • WORK, ENERGY AND POWER

    NCERT BANGLISH|Exercise EXERCISES (ADDITIONAL EXERCISES)|6 Videos

  • WAVES

    NCERT BANGLISH|Exercise Exercises|26 Videos

Similar Questions

Explore conceptually related problems

An electron and a proton are detected in a cosmic ray experiment . Both of them have kinetic energy 100 keV. Which one is faster ?

A proton and electron have kinetic energy equal to 10^5 eV and 10^4 eV respectively. Which of them moves faster ? Also calculate the ratio of their speeds. Given, mass of electron =9.11xx10^(-31) kg , mass of proton =1.67xx10^(-27) kg and 1eV =1.6xx10^(-19) Joule.

Calculate the mass of 1 mol of electrons if the mass of one electron be 9.11xx10^(-31)kg .

Calculate the ratio of velocities of a moving electron to that of a proton associated with the same de Broglie wavelength. [m_(e)=9.11xx10^(-31)kg,m_(p)=1.67xx10^(-27)kg,h=6.626xx10^(-34)J*s ]

A free electron and a free proton are placed in an uniform electric field. Compare their acceleration and the force acting on them. [Rest mass of electron =9.1xx10^(-31)kg and rest mass of proton =1.67xx10^(-27kg ]

What is the de Broglie wavelength related to an electron of energy 100 eV ? (Given, mass of electron, m = 9.1 xx 10^(-31) kg, " " e = 1.6 xx 10^(-19) C and h = 6.63 xx 10^(-34) J.s )

Angular momentum of an electron in an orbit hydrogen atom is 4.2xx10^(-34) J*s . What is the energy of that electron in that orbit? Given mass of an electron = 9.1xx10^(-31)kg ,e=1.6xx10^(-19)C,1eV=1.6xx10^(-19) erg .

In a cyclotron the frequency of alternating current is 12 MHz and the radii of its dee is 0.53m . What is the kinetic energy of the proton beam produced by the cyclotron ? Given mass of proton =1.67xx10^(-27) kg and charge =+1.6xx10^(-19)C .

Radius of the Bohr orbit of hydrogen atom is 0.53 Å . What will be the velocity of the electron in the second quantum state? Given, mass of electron = 9.1xx10^(-31) kg and e=1.6 xx10^(-19) C .

A particle is moving 3 times faster than the speed of electron. If the ratio of wavelength of a particle and electron is 1.8xx10^(-4) , then particle is

NCERT BANGLISH-WORK, ENERGY AND POWER-EXERCISES
  1. Answer carefully, with reasons : If the potential energy of two bill...

    Text Solution

    |

  2. A body is initially at rest. It undergoes one-dimensional motion with ...

    Text Solution

    |

  3. A body is moving unidirectionally under the influence of a source of c...

    Text Solution

    |

  4. A body constrained to move along the z-axis of a coordinate system is ...

    Text Solution

    |

  5. An electron and a proton are detected in a cosmic ray experiment, the ...

    Text Solution

    |

  6. A rain drop of radius 2mm falls from a height of 500 m above the groun...

    Text Solution

    |

  7. A molecule in a gas container hits a horizontal wall with speed 200 ms...

    Text Solution

    |

  8. A pump on the ground floor of a building can pump up water to fill a t...

    Text Solution

    |

  9. Two identical ball bearings in contact with each other and resting on ...

    Text Solution

    |

  10. The bob A of a pendulum released from 30^(@) to the vertical hits anot...

    Text Solution

    |

  11. The bob of a pendulum is released from a horizontal position. If the l...

    Text Solution

    |

  12. A trolley of mass 300 kg carrying sandbag of 25 kg is moving uniformly...

    Text Solution

    |

  13. A body of mass 0.5 kg travels in a straight line with velocity v= ax^(...

    Text Solution

    |

  14. The blades of a windmill sweep out a circle of area A. If the wind f...

    Text Solution

    |

  15. The blades of a windmill sweep out a circle of area A. What is the k...

    Text Solution

    |

  16. The blades of a windmill sweep out a circle of area A. Assume that t...

    Text Solution

    |

  17. A person trying to lose weight (dieter) lifts a 10 kg mass, one thousa...

    Text Solution

    |

  18. A person trying to lose weight (dieter) lifts a 10 kg mass, one thousa...

    Text Solution

    |

  19. A family uses 8 kW of power. Direct solar energy is incident on the ...

    Text Solution

    |

  20. A family uses 8 kW of power. Compare this area to that of the roof o...

    Text Solution

    |