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Which is not true with respect to the ca...

Which is not true with respect to the cathode rays ?

A

A steam of electrons

B

Charged particles

C

Move with same speed as that of light

D

Can be deflected electric field

Text Solution

Verified by Experts

The correct Answer is:
C
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The existence of negatively charged particle in an atom was shown by J.J. Thomson as a result of the studies of the passage of electricity through gases at extremely low pressure known as discharge tube experiments. When a high voltage of the order of 10,000 volts or more was impressed across the electrodes, some sort of invisible rays moved from the negative electrode to the positive electrode these rays are called as cathode rays. Cathode rays travel in straight path in absence of electrical and magnetic field . Cathode rays consist of material part and charged particles? Cathode rays produce X-rays and light is emitted when they strike on ZnS screen. Cathode rays penetrate through thin sheets of aluminium and other metals . They affect the photogenic plate and passes heating effect when they strike on metal foil. The raito of charge to mass i.e charge/mass is same for all the cathode rays irrespective of the gas used in the tube. The existence of positively charged particle in an atom was shown be E. Goldstein. He repeated the same discharge tube experiments by using a perforated cathode. It was observed that when a high potential difference was applied between the electrodes, not only cathode rays were produced but also a new type of rays were produced simultaneoulsy from anode moving towards cathode and passes through the holes or canal of the cathode. These termed as canal rays or anode rays. These rays travel in straight lines and consists of positively charged particles. These rays have kinetic energy and produces heating effect also. The e/m ratio of these rays is smaller than that of electrons. Unlike cathode rays, their e/m value is dependent upon the nature of the gas taken in the tube. These rays produced flashes of light on ZnS screen and can pass throughs thin metal foils. They can produce physical and chemical changes and are capable to produce ionisation in gases. Which is not true with respect to cathode rays?

Cathode rays are

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RESONANCE ENGLISH-NUCLEAR CHEMISTRY-Exercise-2
  1. Which is not true with respect to the cathode rays ?

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  2. Which of the following does not characterise X-rays?

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  3. The mass to charge ratio (m//e) for a cation 1.5xx10^(-8) kg//C. What ...

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  4. From the alpha-particle scattering experiment Rutherford concluded th...

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  5. An oil drop has 6.39 xx 10^(-19)C charge .How many electrons does ...

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  6. Which of the following statement is true in the context of photoelecti...

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  7. The ratio of slopes of K(max) vs. V and V(0) vs. v curves in the photo...

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  8. A light source of wavelength lambda illuminates a metal and ejects pho...

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  9. In Bohr's model of the hydrogen atom, the ratio between the period of ...

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  10. Two identical satellites are moving around the Earth in circular orbit...

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  11. The angular momentum of electron in a given orbit is J . Its kinetic e...

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  12. The potential energy of the electron present in the ground state of L...

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  13. Which transition in Li^(2 +) would have the same wavelength as the 2 r...

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  14. Let v(1) be the frequency of the series limit of the Lyman series, v(2...

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  15. No. of visible lines when an electron return from 5^(th) orbit to grou...

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  16. If the shortest wave length of Lyman series of H atom is x, then the w...

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  17. In a sample of H-atoms , electrons de-excite from a level 'n' to 1 . ...

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  18. A particle X moving with a certain velocity has a debroglie wave lengt...

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  19. which of the given statement(s) is /are false ? (P) orbital angular ...

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  20. The value of the spin only magnetic moment of a particular ion is 2.83...

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