Home
Class 12
PHYSICS
In a hydrogen atube it is observed that ...

In a hydrogen atube it is observed that through a given cross-section `3.13xx10^(15) `electrons per sec, moving from right to left and `3.12xx10^(15)` protons per sec are moving from left to right. The electric current in the discharge tube ad its direction is

A

1 mA towards right

B

1 mA towards left

C

2 mA towards right

D

2 mA towards left

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

An electron moves in a circle of radius 0.15 m with a constant speed of 3.6 xx 10^6 ms^-1 . What electric current does this correspond to?

In hydrogen atom, electron revolves around the nucelus along a path of radius 0.51overset(@)A making 6.8 xx 10^15 revolutions per second. Calculate the equivalent current. Given that charge on electrno =1.6 xx 10^-19C

A beam of electron is moving with a velocity of 3xx10^6ms^-1 and carries a current of 1muA . How many electrons per second pass a given point ?

In a discharge tube the number of hydrogen ions (i.e., protons) drifting across a cross- section per second is 1.0xx10^(18), while number of electrons drifting in opposite direction across another cross-section is 2.5xx10^(18) per second. If the supply voltage is 220 V, what is the effective resistance of the tube ?

A current of 2.4 A flows through a wire of cross-sectional area 1.5 mm^2 . Find the current density in the wire. If the wire contains 8 xx 10^28m^-3 elecrtrons per unit volume calculate the average relaxation on time. Given that charge on electron = 1.6 xx 10^-19C and mass of electron =9.1 xx 10^-31 kg.

A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 xx 10^-7 m^2 , and its resistance is measured to be 5.0 Omega . What is the resistivity of the material at the temperature of the experiment?

A negligibly small current is passed through a wire of length 15 m and uniform cross section 6.0 xx 10^-7 m^2 and its resistance is measured to be 5.0 Omega . What is the resistivity of the material at the temperatuare of the experiment?

A closely wound solenoid of 1000 turns and area of cross section 1.4xx10^(-4)m^(2) carrying a current of 3 A is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. Direction. In the follwing questions, a statement of assertion is foll...

    Text Solution

    |

  2. Direction. In the follwing questions, a statement of assertion is foll...

    Text Solution

    |

  3. In a hydrogen atube it is observed that through a given cross-section ...

    Text Solution

    |

  4. When current flows in a conductor, then the ratio of the intensity of ...

    Text Solution

    |

  5. Ohm's law is not obeyed by:

    Text Solution

    |

  6. Fill ups The S.I unit of resistance is……………and is denoted by…………… .

    Text Solution

    |

  7. What is unit of resistance? Define it.

    Text Solution

    |

  8. A solenoid is at potential difference of 60 V. current flowing through...

    Text Solution

    |

  9. The resistance of a discharge tube is

    Text Solution

    |

  10. A nichrome wire 1 m long and 1mm^2 in cross-section area drawn 4A at 2...

    Text Solution

    |

  11. Reciprocal of resistance is called conductance.(True/False)

    Text Solution

    |

  12. Which of the following physical quantities possesses the dimensions of...

    Text Solution

    |

  13. The filament of electric bulb is made of .............. .

    Text Solution

    |

  14. The length of a wire is doubled. Its conductance will

    Text Solution

    |

  15. The length of a wire is doubled by pulling it.Find the new resistance.

    Text Solution

    |

  16. Which of the following has negative temperature coefficient of resista...

    Text Solution

    |

  17. Which of the following has a negative temperature coefficient?

    Text Solution

    |

  18. A wire has a resistance of 3.1 Omega at 30^@C and a resistance of 4....

    Text Solution

    |

  19. A wire has a resistance of 3.1Omega at 30^@C and a resistance of 4.5Om...

    Text Solution

    |

  20. Three bulbs of electric powers 40 W, 60 W and 100 W are connected in s...

    Text Solution

    |