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The colour of the positive column ina ga...

The colour of the positive column ina gas discharge tube depends on

A

natruue of gas in the discharge tube

B

potential difference between cathode and anode

C

natrue of material of cathode

D

nature of glass of the discharge tube

Text Solution

Verified by Experts

The correct Answer is:
D
In the discharge tube, a fluorescent glow is seen on the glass opposite to the type of glass, it being yellowish-green for soda glass.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTRONS AND PROTONS-Exercise 1
  1. Value of e/m (specific charge) of the cathode ray particles

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  2. When electric field is applied between cathode annd anode, at pressure...

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  3. The colour of the positive column ina gas discharge tube depends on

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  4. In Millikan's oil drop experiment, a charged oil drop of mass 3.2xx10...

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  5. The specific charge of a proton is 9.6xx10^(7)"C kg"^(-1). The speci...

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  6. Positive rays are very identical to

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  7. Few metals when irradiated with ultraviolet light emits

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  8. Non-dependence of e/m oof the cathode ray particles on nature of the g...

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  9. The velocity of electrons emitted from the electron gun can be increas...

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  10. A beam of cathode rays is subjected to crossed electric (E ) and magn...

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  11. In the phenomenon of electric discharge through gases at low pressure ...

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  12. Canal rays are

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  13. Cathode rays enter a magnetic field making oblique angle with the line...

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  14. Millikan's oil drop experiment established that

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  15. The photoelectric threshould wavelength for a metal surface is 6600 Å....

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  16. Ligth of wavelength 4000 Å is incident on a metal plate whose work fun...

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  17. The frequency of incident light falling on a photosensitive metal plat...

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  18. If the work function for a certain metal is 3.2 xx 10^(-19) joule and ...

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  19. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

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  20. Light of wavelength 4000 Å is incident on a sodium surface for which t...

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