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Canal ray particles have e//m ratio many...

Canal ray particles have `e//m` ratio many times smaller than those of electrons due to their

A

much lower charges

B

much lower masses

C

much higher charges

D

much greater masses

Text Solution

Verified by Experts

The correct Answer is:
D
In `e//m` ratios, `e` is identical but `m` is different and positive ions have much greater masses.
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e//m ratio of proton is greater than that of electron

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. For cathode rays the value of e/m:

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?

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. Select the incorrect statement.

How many times is a proton heavier than an electron ?

Mu on (mu^(-)) is a negatively charged (|q|=|e|) particle with a mas m_(mu)=200 m_(e ) where m_(e ) is the mass of the electron and e is the electronic charge . If mu^(-) is bound to a proton to from a hgydrogen like atom identify the correct statements (A) Radius of the muonic orbit is 200 times smaller than that of the electron (B) The speed of the mu^(-) in the n^(th) orbit is 1/200 times that of the electron in the n^(th) orbit (c )The ionizaion energy of muonic atom is 200 times more than that of an hydrogen atom (D) The momentum of the muon in the m^(th) orbit is 200 times more than that of the electron

The e/m ratio for cathode rays:

Thomson's analysis of cathode ray experiment led him to conclude that electrons were fundamental particles. e//m ratio for particles in cathode rays was found to be independent of the nature of the gas taken in the tube.

The e/m ratio for Anode rays

R SHARMA-STRUCTURE OF ATOM-Follow-up Test
  1. The forerunner of today's television tube is the

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  2. A strong fluoresence, i.e., emission of light is observed is bombarded...

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  3. Canal ray particles have e//m ratio many times smaller than those of e...

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  4. When difference elements are present in the discharged tube positive i...

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  5. In Millikan's experiment, static electric charge on the oil droplets t...

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  6. Which of the following forces act on oil drops in Millikan's experimen...

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  7. It is possible to take an X ray photograph (radiograph) of the bones o...

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  8. Which of the following is incorrect?

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  9. Alpha (alpha) particles are

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  10. Studies on the phenomenon of radioactivity supported the conclusion th...

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  11. Which of the following is incorrect for Thomson's model of the atom?

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  12. Rutherford's experiment on the scattering of alpha particles slowed fo...

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  13. Rutherford's scattering experiment is related to theof the nucleus.

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  14. Rutherfords experiments , which established the nuclear model of atom ...

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  15. The radius of an atomic nucleus is of the order of

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  16. Ordinary ''lead'' pencils actually are made of a form of carbon called...

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  17. Rutherford's alpha particle scattering experiment eventually led to th...

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  18. Which of the following symbols are not acceptable ? (i) .(35)^(79)Br...

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  19. The increasing order (lowest first) for the values of e//m (charge//ma...

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  20. Which of the following characterize X rays? (i) X rays have waveleng...

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