Home
Class 12
PHYSICS
Colour in discharge tube filled with gas...

Colour in discharge tube filled with gas at low pressure is due to …

A

electron in excited state in atom

B

collision between atoms of gas

C

collision between charged particles emitted from cathode and gas atom.

D

collision between electrons of atoms.

Text Solution

Verified by Experts

The correct Answer is:
A
In atom electron get in excited state hence colour in seen in discharge tube.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in CBSE-PMT,AIPMT,NEET)|1 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in AIIMS)|55 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQ based on Textual Illustrations and Exercise)|1 Videos

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN BOARD EXAM AND GUJCET)|23 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D MCQS ASKED IN COMPETITIVE EXAMES (MCQS AKSED IN BOARD EXAM AND GUJCET)|14 Videos

Similar Questions

Explore conceptually related problems

Light coming from a discharge tube filled with hydrogen falls on the cathode for the photoelectric cell. The work function of the surface of cathode is 4eV . Which one of the following values of the anode voltage (in volts) with respect to the cathode will likely to make the photo current zero?

Two glass bulbs of equal volume are connected by a narrow tube and are filled with a gas at 0^@C and a pressure of 76cm of mercury. One of the bulbs is then placed in melting ice and the other is placed in a water bath maintained at 62^@C . What is the new value of the pressure inside the bulbs? The volume of the connecting tube is negligible.

A container with insulating walls is divided into two equal parts by a partition fitted with a valve. One part is filled with an ideal gas at a pressure P and temperature T, whereas the other part is completely evacuated . If the valve is suddenly opened, the pressure and temperature of the gas will be

In a U-tube if different liquids are filled then we can say that pressure at same level of same liquid is same. Q. If small but equal lengths of liquid -1 and liquid -2 are increased in their corresponding sides then h will

Consider a cycle tyre being filled with air by a pump. Let V be the volume of the tyre (fixed) and at each stroke of the pump DeltaV(lt lt V) of air is transferred to the tube adiabatically. What is the work done when the pressure in the tube is increased from P_1 to P_2 ?

For an adiabatic process PV^gamma = constant. Evaluate this "constant" for an adiabatic process in which 2 mol of an ideal gas is filled at 1.0 atm pressure and 300 K temperature. Consider the ideal gas to be diatomic rigid rotator.

KUMAR PRAKASHAN-DUAL NATURE OF RADIATION AND MATTER-Section-D (MCQs asked in competitve exams)
  1. A light source emit monochromatic light of 5000 Å wavelength and prod...

    Text Solution

    |

  2. Energy corresponding to threshold frequency of metal is 6.2 eV.For giv...

    Text Solution

    |

  3. Colour in discharge tube filled with gas at low pressure is due to …

    Text Solution

    |

  4. Find velocity of particle with 1 mg mass and having same wavelength th...

    Text Solution

    |

  5. No . Of photoelectron emited by light with frequency f is proportional...

    Text Solution

    |

  6. helium-Neon laser emit monochromatic light of 667 nm abd produce power...

    Text Solution

    |

  7. In given region electric and magnetic field are prpendicular to each o...

    Text Solution

    |

  8. A source S(1) produces 10^(15) photon every second having wavelength o...

    Text Solution

    |

  9. Ultraviolet light of 200 nm wavelength is incident on nickel surface h...

    Text Solution

    |

  10. In Davisson-Germer experiment in order to increase velocity of electro...

    Text Solution

    |

  11. In electron microscope 25 kV voltage is used to accelerate electron .B...

    Text Solution

    |

  12. The threshold frequency for a certain metal is 3.3xx10^(14) Hz.If ligh...

    Text Solution

    |

  13. For photoelectric emission from certain metal the cutoff fequency is v...

    Text Solution

    |

  14. The wavelength lambda(e) of an electron and lambda(P) of a photon of s...

    Text Solution

    |

  15. When the energy of the incident radiation is increased by 20% ,the kin...

    Text Solution

    |

  16. A certain metallic surface is illuminated with monochromatic light of ...

    Text Solution

    |

  17. Light of wavelength 500 nm is incident on a metal with work functin 2....

    Text Solution

    |

  18. A photoelectric surface is illuminated successively by monochromatic l...

    Text Solution

    |

  19. When a metallic surface is illuminated with radiation of wavelength la...

    Text Solution

    |

  20. An electron of mass m and a photon have same energy E.The ratio of de-...

    Text Solution

    |