Why e/m value of positive rays is smaller than cathode rays?
Very lowExplanation:Cathode rays contains electrons and positive rays contain positive charged gaseous atom mass of electron is negligible in comparison to positive charge atom∴ e/m ratio for cathode rays is very low.
Why the EM ratio is constant for cathode rays?
This is because cathode rays consist of electrons. The e/m ratio does not depend on the type of gas filled in the discharge tube. For only the cathode rays, the constituent particle always remains the same that is why the ratio is the same.
How do cathode rays differ from positive rays?
Generally cathode rays are referred to as electrons and anode rays are protons. Cathode rays are produced at the cathode which is the positive side….How do cathode rays differ from anode rays?
| Cathode rays | Anode rays |
|---|---|
| Charge by mass ratio is same for all gases | Charge by mass ratio is different |
| Attracted to positive plates | Attracted to negative plates |
Which has highest Em ratio?
Overall the highest value of e/m ratio is for ion.
Why is Em ratio of anode not constant?
These positively charged particles are anode rays. The different gases have different types of positive rays,that contain particles of different mass and charge. Therefore, the charge to mass ratio of anode depends on the gas. This ratio is not constant.
Why E M ratio of proton is less than electron?
The proton has mass very much greater than the mass of an electron. The value of \[e/m\] for protons is lower compared to the value of electrons.
Why cathode rays move from cathode to anode?
The cathode is a negatively-charged electrode or conductor, and the anode is a positively-charged conductor. Electrons carry negative charge, so they flow off the cathode and are attracted towards the positive electrode, anode.
What are cathode rays What are the difference between cathode rays and anode rays?
Cathode rays contain material particles (electrons) which are negatively charged. Anode rays contain material particles which are positively charged. These rays are deflected in both magnetic and electric fields. These rays are deflected in both magnetic and electric fields.
What are the differences between cathode rays and Canal Rays?
What is the difference between cathode rays and canal rays? Cathode rays are charged negatively, while Canal Rays are charged positively. Cathode rays emanate from the cathode, while the rays of the canal do not emanate from the anode, but are produced inside the chamber by the collision of gas molecules.
For which Ray e M ratio is maximum and why?
Where, m = mass and e = charge. -Hence, we can say that the correct option is (b), that is the e/m ratio is maximum for ${{H}^{+}}$. Note: – It is found that the value of e/m ratio remains constant irrespective of the nature of the gas.
Why do we calculate EM ratio?
The measuring the e/m ratio of an electron was very important so physics could gain a better understanding of this particle. The measuring the e/m ratio of an electron was very important to physics at the beginning of the 1900s. It allowed scientists to gain a better understanding of this newly discovered particle.
Does the EM ratio for anode rays?
The e/m ratio of cathode rays does not change by changing the gas in cathode ray discharge tube. But the e/m ratio of anode rays changes by changing the gas in the discharge tube.
What is the E/M ratio for cathode rays?
is constant The e/m ratio for cathode rays is constant. It is equal to 1.76×108C /g. It is independent of the nature of gas in discharge tube and nature of cathode or electrodes of tube.
What is the difference between cathode rays and positive rays?
Cathode rays are the stream of electrons. The mass and charge of electron is always constant due to which specific charge of cathode (e/m) is always constant. But positive rays are stream of positive ions.Masses of positive ions varies for different substances.
Who first measured the charge-to-mass ratio of the fundamental particle of charge?
J.J. Thomson flrst measured the charge-to-mass ratio of the fundamental particle of charge in a cathode ray tube in 1897. A cathode ray tube basically consists of two metallic plates in a glass tube which has been evacuated and fllled with a very small amount of background gas.
How do you find the charge to mass ratio?
The charge-to-mass (e/m) ratio of the particles can be measured by observing their motion in an applied magnetic fleld. Thomson repeated his measurement of e/m many times with difierent metals for cathodes and also difierent gases.