Which of the following are the properties of an electron? 1. Electron is a constituent of cathode ray 2. Electron is a negatively charged particle 3. The mass of the electron is equal to the mass of the proton 4. Electron is deflected by the electric fiel

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Q: 41 (NDA-II/2015)

Which of the following are the properties of an electron?
1. Electron is a constituent of cathode ray
2. Electron is a negatively charged particle
3. The mass of the electron is equal to the mass of the proton
4. Electron is deflected by the electric field but not by magnetic field
Select the correct answer using the code given below:

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,21,21,21,18,1,2

keywords: 

{'electron': [0, 0, 0, 2], 'properties': [0, 0, 0, 1], 'electric field': [0, 0, 0, 1], 'cathode ray': [0, 0, 0, 1], 'proton': [0, 0, 1, 2], 'particle': [0, 2, 8, 30], 'magnetic field': [0, 0, 0, 6], 'constituent': [0, 0, 1, 4]}

The correct answer is option 1, which states that properties 1 and 2 are true.

Let`s examine each property in detail:

1. Electron is a constituent of cathode ray: This property is true. Cathode rays are streams of electrons that are produced in a vacuum tube when a high voltage is applied across electrodes. Electrons are the primary constituent of cathode rays.

2. Electron is a negatively charged particle: This property is also true. Electrons have a negative charge (-1) and are one of the fundamental particles of matter.

3. The mass of the electron is equal to the mass of the proton: This property is false. The mass of an electron is much smaller than the mass of a proton. The mass of an electron is approximately 1/1836 times the mass of a proton.

4. Electron is deflected by the electric field but not by magnetic field: This property is false. Electrons are deflected by both electric and magnetic fields. In fact, they are used in devices such as cathode ray tubes and particle accelerators precisely because they can be deflected by both types of fields.

Therefore, options 2, 3, and 4 are incorrect. Only option 1 correctly identifies the properties of an

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