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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:

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: Correct Answer 1 and 2 only 

CONCEPT:

  • The electrons, protons and neutrons are three fundamental particles of an atom.
  • The electrons are negatively charged and protons are positively charged.
  • Neutrons are neutral.

EXPLANATION:

  • As the cathode rays are the stream of electrons. So an electron is a constituent of the cathode ray. Statement 1 is correct.
  • Since the electron is a negatively charged particle. So statement 2 is correct.

Mass of an electron = 9.1 × 10-31 kg

Mass of a proton = 1.67 × 10-27 kg

  • Since the mass of the electron is not equal to the mass of the proton. So statement 3 is wrong.
  • As electrons have a charge which can deflect in both electric as well as the magnetic field. So statement 4 is not correct.

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