Class 12 Exam > Class 12 Questions > J.J. Thomson’s cathode-ray tube experim...
Start Learning for Free
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]
- a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tube
- b)cathode rays are streams of negatively
charged ions - c)all the mass of an atom is essentially in the
nucleus - d)the e/m of electrons is much greater thanthe e/m of protons
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [200...
Cathode rays are streams of negatively
charged ions
charged ions
Most Upvoted Answer
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [200...
Overview of J.J. Thomson's Experiment
J.J. Thomson's cathode-ray tube experiment in the late 19th century was pivotal in the discovery of the electron and understanding atomic structure.
Key Findings of the Experiment
- Nature of Cathode Rays: Thomson demonstrated that cathode rays are composed of particles with a negative charge, which he later named electrons. This was a significant revelation, as it challenged the prevailing notion that atoms were indivisible.
- Charge-to-Mass Ratio (e/m): He measured the charge-to-mass ratio (e/m) of these particles, showing that they were much lighter than atoms. This discovery laid the groundwork for understanding subatomic particles.
Understanding Option 'B'
- Negatively Charged Ions: The correct answer states that "cathode rays are streams of negatively charged ions." While it's important to note that Thomson specifically identified electrons as the constituents of cathode rays, the term "negatively charged ions" can be a bit misleading.
- Electrons vs. Ions: In the context of Thomson's findings, cathode rays are indeed composed of electrons, which are fundamental particles and not ions. Ions are atoms or molecules that have gained or lost electrons. However, in a broader sense, the statement can be interpreted that cathode rays carry a negative charge, which aligns with the properties of electrons.
Conclusion
Thomson's experiment was crucial in identifying electrons and establishing the concept of charged particles within atoms. The understanding that cathode rays consist of negatively charged particles (electrons) helped lay the foundation for modern atomic theory.
J.J. Thomson's cathode-ray tube experiment in the late 19th century was pivotal in the discovery of the electron and understanding atomic structure.
Key Findings of the Experiment
- Nature of Cathode Rays: Thomson demonstrated that cathode rays are composed of particles with a negative charge, which he later named electrons. This was a significant revelation, as it challenged the prevailing notion that atoms were indivisible.
- Charge-to-Mass Ratio (e/m): He measured the charge-to-mass ratio (e/m) of these particles, showing that they were much lighter than atoms. This discovery laid the groundwork for understanding subatomic particles.
Understanding Option 'B'
- Negatively Charged Ions: The correct answer states that "cathode rays are streams of negatively charged ions." While it's important to note that Thomson specifically identified electrons as the constituents of cathode rays, the term "negatively charged ions" can be a bit misleading.
- Electrons vs. Ions: In the context of Thomson's findings, cathode rays are indeed composed of electrons, which are fundamental particles and not ions. Ions are atoms or molecules that have gained or lost electrons. However, in a broader sense, the statement can be interpreted that cathode rays carry a negative charge, which aligns with the properties of electrons.
Conclusion
Thomson's experiment was crucial in identifying electrons and establishing the concept of charged particles within atoms. The understanding that cathode rays consist of negatively charged particles (electrons) helped lay the foundation for modern atomic theory.
Free Test
FREE
| Start Free Test |
Community Answer
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [200...
This was the result of J J Thomson experiment
|
Explore Courses for Class 12 exam
|
|
Top Courses for Class 12View all
Question Description
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer?.
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer?.
Solutions for J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice J.J. Thomson’s cathode-ray tube experimentdemonstrated that [2003]a)the e/m ratio of the cathode-ray particleschanges when a different gas is placed inthe discharge tubeb)cathode rays are streams of negativelycharged ionsc)all the mass of an atom is essentially in thenucleusd)the e/m of electrons is much greater thanthe e/m of protonsCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily