Thomson's Discovery of Electrons

Q.

What were Thomsons conclusions from cathode ray tube experiments?

Q.

Cathode rays are deflected by

1. electric field only

2. magnetic field only

3. electric and magnetic field

4. none of these

Q. Which fluorescent material was used in Thomson’s cathode ray experiment?

1. $FeS$
2. $Zn{S}_2$
3. $ZnS$
4. $Fe{S}_2$

Q.

When electric field is applied, the cathode rays bend towards_______.

Q. Statement - 1: Thomson’s model of the atom suggests that an atom has an elliptical shape.
Statement - 2: Thomson’s model of the atom explains the electrical neutrality of the atom.

1. TT
2. TF
3. FT
4. FF

Q. The ratio of the (e/m) ratio of an electron and an alpha particle is:

1. 2:1
2. 1:1
3. 1:2
4. None of these

Q. Calculate the mass of a proton if the charge to mass ratio of an electron is $1.758820\times {10}^{11}{\text{C kg}}^{-1}$ and it is known that the mass of a proton is 1837 times greater than the mass of an electron.

1. $9.1\times {10}^{-31}$ kg
2. $6.4\times {10}^{31}$ kg
3. $1.67\times {10}^{-27}$ kg
4. $6.02\times {10}^{23}$ kg

Q.

________________rays are also called canal rays.

Q.

According to Thomson model, the mass of the atom is assumed to be uniformly distributed over the atom.

1. True

2. False

Q. Electrons and Neutrons were discovered respectively by:

1. J.J Thomson and E. Goldstein
2. E. Goldstein and E. Rutherford
3. J.J Thomson and J. chadwick
4. Both were discoverd by J.J thomson

Q. Calculate the mass of a proton if the charge to mass ratio of an electron is $1.758820\times {10}^{11}{\text{C kg}}^{-1}$ and it is known that the mass of a proton is 1837 times greater than the mass of an electron.

1. $9.1\times {10}^{-31}$ kg
2. $6.4\times {10}^{31}$ kg
3. $1.67\times {10}^{-27}$ kg
4. $6.02\times {10}^{23}$ kg

Q.

Name the scientist who performed cathode ray experiment using a discharge tube.

Q. According to Thomson's model, the mass of an atom is assumed to be uniformly distributed over the atom.

1. True
2. False

Q. Which of the following statement(s) is/are correct about Thomson's model of the atom?

1. Positive charge is uniformly distributed through out the atom and negatively charged particles are embedded in most stable elctrostatic arrangement
2. Negative charge is uniformly distributed through out the atom and positive charge is embedded in most stable elctrostatic arrangement
3. Mass of the atom is uniformly distributed through out the atom
4. Thomson's model of the atom explains the overall neutality of the atom

Q. Which of the following statement(s) is/are correct about Thomson's model of the atom?

1. Positive charge is uniformly distributed through out the atom and negatively charged particles are embedded in most stable elctrostatic arrangement
2. Negative charge is uniformly distributed through out the atom and positive charge is embedded in most stable elctrostatic arrangement
3. Mass of the atom is uniformly distributed through out the atom
4. Thomson's model of the atom explains the overall neutality of the atom

Q. Electron was discovered by:

1. J.J. Thomson
2. James Chadwick
3. Eugen Goldstein
4. E. Rutherford

Q. The schematic diagram is given for cathode ray discharge tube experiment.

Which of the following statement(s) is/are true about the above experiment?

1. Cathode rays starts from anode and move towards cathode

2. Cathode rays start from cathode and move towards anode

3. Cathode rays consist of negatively charged particles

4. Cathode rays are invisible to the naked eye but produces a bright spot when it strikes on the surface of the fluroscent
   material