Home
Class 12
PHYSICS
The number of electrons striking the scr...

The number of electrons striking the screen of CRT is `7.5xx10^(15)` in 10 s. Calculate the electric current.

Text Solution

Verified by Experts

`i= q/t = ("ne")/t = (7.5xx10^(5) xx 1.6xx10^(-19))/(10)`
`=120 mu A`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (LONG ANSWER QUESTIONS)|2 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (SHORT ANSWER QUESTIONS)|1 Videos

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise PRACTICE EXERCISE (TV Antenna)|16 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos

Similar Questions

Explore conceptually related problems

In a hydrogen atom, electron moves in an orbit of radius 5 xx 10^(-11) m with a speed of 2.2xx10^6 m/s . Calculate the equivalent current.

The threshold frequency (v_(0)) for a metal is 5 xx 10^(14)S^(-1) . Calculate the kinetic energy of emitted electron when a radiation with frequency of 2 xx 10^(15) sec^(-1) hits the metal surface.

The mass of an electron is 9.1xx10^(-31)kg . If its K.E . Is 3.0xx10^(-25)J , calculate its wavelength .

The velocity of electron in hydrogen atom is 7.29 xx 10 cm/sec. The potential energy of that electron is

AAKASH SERIES-CURRENT ELECTRICITY-PROBLEMS (LEVEL-II)
  1. The number of electrons striking the screen of CRT is 7.5xx10^(15) in ...

    Text Solution

    |

  2. A battery of emf 10 V and internal resistance 3Omega is connected to a...

    Text Solution

    |

  3. At room temperature (27.0^@ C) the resistance of a heating element is ...

    Text Solution

    |

  4. Determine the current in each branch of the network shown in figure.

    Text Solution

    |

  5. A storage battery of emf 80V and internal resistance 0.5Omega is being...

    Text Solution

    |

  6. Two wires of equal length, one of aluminium and the other of copper ha...

    Text Solution

    |

  7. Given 'n' resistors each of resistance R, how will you combine them to...

    Text Solution

    |

  8. Determine the equivalent resistance of networks shown in figures above

    Text Solution

    |

  9. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  10. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  11. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  12. (6//11) Omega

    Text Solution

    |

  13. Figure shows a 2.0 V potentiometer used for the determination of inter...

    Text Solution

    |

  14. A heating element using nichrome connected to a 230 V supply draws an ...

    Text Solution

    |

  15. The earth's surface has a negative surface charge density of 10^(-9)C ...

    Text Solution

    |

  16. Six lead-acid secondary cells each of emf 2.0 V and internal resistanc...

    Text Solution

    |

  17. A secondary cell after long use has an emf of 1.9 V and a large intern...

    Text Solution

    |

  18. Determine the current drawn from a 12V supply with internal resistance...

    Text Solution

    |

  19. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |

  20. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |

  21. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |