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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 stream of electrons

B

Charged particles

C

Move with speed as that of light

D

Can be deflected by magnetic fields

Text Solution

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The correct Answer is:
C
Cathode rays do not travel with the velocity of light.
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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. Which is not true with respect to cathode rays?

Cathode rays are

Cathode rays are

What are cathode rays ?

Cathode rays have

Cathode rays have:

DINESH PUBLICATION-ATOMIC STRUCTURE-Revision Questions
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  2. Which one of the following pairs of ions have the same electronic conf...

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  3. Which is not true with respect to the cathode rays ?

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  4. An element M has an atomic mass 19 and atomic number 9. Its ion is rep...

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  5. Rutherford's alpha particle dispersion experiment concludes that

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  6. Which of the following element's outermost orbit's last electron has m...

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  7. which of the following ions has the maximum magnetic moment ?

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  9. Chloride ion and potassium ion are isoelectronic. Then

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  10. For f-orbital, the values of m are

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  11. The correct orders of increasing energy of atomic orbitals is

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  12. Which of the following is not isoelectronic ?

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  13. As the nuclear charge increases from neon to calcium, the orbital ener...

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  14. The value of the energy for the first excited state of hydrogen will b...

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  15. In hydrogen atom, energy of first excited state is - 3.4 eV. Then, KE...

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  16. The energy of the first electron in helium will be

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  17. In a hydrogen atom, if energy atom, if energy of an electron in group ...

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  18. In the Bohr's orbit, what is the ratio of total kinetic energy and tot...

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