- 1(current)
Q. No.The total energy of an electron is \(3.555~\text{MeV}.\) Its kinetic energy will be:
1. \(3.545~\text{MeV}\)
2. \(3.045~\text{MeV}\)
3. \(3.5~\text{MeV}\)
4. none of the above
Subtopic: Â Electron Emission |
Level 3: 35%-60%
AIPMT - 1999
Hints
Which of the following is not the property of cathode rays?
| 1. | It produces a heating effect. |
| 2. | It does not deflect in the electric field. |
| 3. | It casts a shadow. |
| 4. | It produces fluorescence. |
Subtopic: Â Electron Emission |
 68%
Level 2: 60%+
AIPMT - 2002
Hints
J.J. Thomson's cathode-ray tube experiment
demonstrated that:
demonstrated that:
| 1. | cathode rays are streams of negatively charged ions. |
| 2. | all the mass of an atom is essentially in the nucleus. |
| 3. | the \(\frac{e}{m}\) of electrons is much greater than the \(\frac{e}{m}\) of protons. |
| 4. | the \(\frac{e}{m}\) ratio of the cathode ray particles changes when a different gas is placed in the discharge tube. |
Subtopic: Â Electron Emission |
 56%
Level 3: 35%-60%
AIPMT - 2003
Hints
- 1(current)
Q. No.
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