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Which of the following may be an incorrect statement regarding cathode ray discharge tube?
- a)Presence of negative charge in cathode rays
- b)The magnetic field deflects these rays
- c)It needs high voltage
- d)Protons are present in cathode rays
Correct answer is option 'D'. Can you explain this answer?
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Which of the following may be an incorrect statement regarding cathode...
Electric discharge in partially evacuated tubes in cathode ray discharge tube. Cathodes rays are made up of electrons. There is a presence of negative charge in cathode rays, magnetic field deflects these rays. Cathode ray discharge tube needs high voltage.
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Which of the following may be an incorrect statement regarding cathode...
The incorrect statement regarding cathode ray discharge tube is:
d) Protons are present in cathode rays
Explanation:
A cathode ray discharge tube is a sealed glass tube that contains a cathode (negatively charged electrode) and an anode (positively charged electrode). It is used to study the properties of cathode rays, which are streams of electrons emitted from the cathode.
Presence of negative charge in cathode rays:
Cathode rays are composed of negatively charged particles, which we now know as electrons. These electrons are emitted from the cathode due to the high voltage applied across the tube. Therefore, option 'a' is a correct statement.
The magnetic field deflects these rays:
Cathode rays are deflected by a magnetic field. When a magnetic field is applied perpendicular to the path of cathode rays, they experience a force due to their negative charge and get deflected. This phenomenon is known as the magnetic deflection of cathode rays. Therefore, option 'b' is a correct statement.
It needs high voltage:
To accelerate the electrons and generate cathode rays, a high voltage is necessary. The high voltage creates an electric field that accelerates the electrons from the cathode towards the anode. This acceleration causes the electrons to gain kinetic energy and form a stream of cathode rays. Therefore, option 'c' is a correct statement.
Protons are present in cathode rays:
The statement in option 'd' is incorrect. Cathode rays do not contain protons. Protons are positively charged particles found in the nucleus of an atom, while cathode rays are composed of electrons. The discovery of the proton came later, and it was found to be a constituent of atomic nuclei. Therefore, option 'd' is the incorrect statement.
In summary, the correct statement regarding cathode ray discharge tube is that it requires high voltage, and the incorrect statement is that protons are present in cathode rays.
d) Protons are present in cathode rays
Explanation:
A cathode ray discharge tube is a sealed glass tube that contains a cathode (negatively charged electrode) and an anode (positively charged electrode). It is used to study the properties of cathode rays, which are streams of electrons emitted from the cathode.
Presence of negative charge in cathode rays:
Cathode rays are composed of negatively charged particles, which we now know as electrons. These electrons are emitted from the cathode due to the high voltage applied across the tube. Therefore, option 'a' is a correct statement.
The magnetic field deflects these rays:
Cathode rays are deflected by a magnetic field. When a magnetic field is applied perpendicular to the path of cathode rays, they experience a force due to their negative charge and get deflected. This phenomenon is known as the magnetic deflection of cathode rays. Therefore, option 'b' is a correct statement.
It needs high voltage:
To accelerate the electrons and generate cathode rays, a high voltage is necessary. The high voltage creates an electric field that accelerates the electrons from the cathode towards the anode. This acceleration causes the electrons to gain kinetic energy and form a stream of cathode rays. Therefore, option 'c' is a correct statement.
Protons are present in cathode rays:
The statement in option 'd' is incorrect. Cathode rays do not contain protons. Protons are positively charged particles found in the nucleus of an atom, while cathode rays are composed of electrons. The discovery of the proton came later, and it was found to be a constituent of atomic nuclei. Therefore, option 'd' is the incorrect statement.
In summary, the correct statement regarding cathode ray discharge tube is that it requires high voltage, and the incorrect statement is that protons are present in cathode rays.
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Which of the following may be an incorrect statement regarding cathode ray discharge tube?a)Presence of negative charge in cathode raysb)The magnetic field deflects these raysc)It needs high voltaged)Protons are present in cathode raysCorrect answer is option 'D'. Can you explain this answer?
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