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The ratio of e/m, i.e., specific charge for a cathode ray :
- a)has the smallest value when the discharge tube is filled with H2
- b)is constant
- c)varies with the atomic number of gas in the discharge
- d)varies with the atomic number of an element forming the cathode
Correct answer is option 'B'. Can you explain this answer?
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The ratio of e/m, i.e., specific charge for a cathode ray : a)has the ...
A characteristic of cathode rays particles (electrons), e/m is constant as electron is fundamental particle
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The ratio of e/m, i.e., specific charge for a cathode ray : a)has the ...
The ratio of e/m, which represents the specific charge for a cathode ray, is constant. This means that it does not change regardless of the conditions or the type of gas present in the discharge tube. The correct answer is option 'B'.
Explanation:
The specific charge (e/m) of a cathode ray is a fundamental property of the cathode rays, which are streams of electrons emitted from the cathode in a discharge tube. This specific charge represents the ratio of the charge (e) of an electron to its mass (m).
To understand why the ratio of e/m is constant, let's consider the basic principles of cathode ray tubes and electron behavior:
1. Cathode Ray Tubes:
- Cathode ray tubes consist of a sealed glass tube with two electrodes - a cathode (negative electrode) and an anode (positive electrode).
- When a high voltage is applied across the electrodes, a cathode ray is produced, which travels from the cathode to the anode.
- The cathode rays are deflected by electric and magnetic fields, which allows for their study and measurement.
2. Electron Behavior:
- Electrons are negatively charged particles with a relatively small mass compared to other subatomic particles.
- The charge of an electron (e) is a fundamental constant and does not change.
- The mass of an electron (m) is also a constant value.
Based on these principles, we can understand why the ratio of e/m is constant:
- The charge of an electron (e) is a fixed value, and it does not change regardless of the conditions or the type of gas present in the discharge tube.
- The mass of an electron (m) is also constant and does not depend on the conditions or the type of gas.
- Since both the charge and the mass of an electron are constant, the ratio e/m is constant.
Therefore, the ratio of e/m, which represents the specific charge for a cathode ray, is constant and does not vary with the atomic number of the gas in the discharge tube or the atomic number of the element forming the cathode.
Explanation:
The specific charge (e/m) of a cathode ray is a fundamental property of the cathode rays, which are streams of electrons emitted from the cathode in a discharge tube. This specific charge represents the ratio of the charge (e) of an electron to its mass (m).
To understand why the ratio of e/m is constant, let's consider the basic principles of cathode ray tubes and electron behavior:
1. Cathode Ray Tubes:
- Cathode ray tubes consist of a sealed glass tube with two electrodes - a cathode (negative electrode) and an anode (positive electrode).
- When a high voltage is applied across the electrodes, a cathode ray is produced, which travels from the cathode to the anode.
- The cathode rays are deflected by electric and magnetic fields, which allows for their study and measurement.
2. Electron Behavior:
- Electrons are negatively charged particles with a relatively small mass compared to other subatomic particles.
- The charge of an electron (e) is a fundamental constant and does not change.
- The mass of an electron (m) is also a constant value.
Based on these principles, we can understand why the ratio of e/m is constant:
- The charge of an electron (e) is a fixed value, and it does not change regardless of the conditions or the type of gas present in the discharge tube.
- The mass of an electron (m) is also constant and does not depend on the conditions or the type of gas.
- Since both the charge and the mass of an electron are constant, the ratio e/m is constant.
Therefore, the ratio of e/m, which represents the specific charge for a cathode ray, is constant and does not vary with the atomic number of the gas in the discharge tube or the atomic number of the element forming the cathode.
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The ratio of e/m, i.e., specific charge for a cathode ray : a)has the smallest value when the discharge tube is filled with H2 b)is constant c)varies with the atomic number of gas in the discharge d)varies with the atomic number of an element forming the cathodeCorrect answer is option 'B'. Can you explain this answer?
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