J.J.Thomson's experiment, involving the motion of an electron beam in mutually perpendicular and fields, gave the value of:
A)the mass of an electron
B)the charge of an electron
C)the Earth's magnetic field
D)the charge/mass ratio for an electron
E)Avogadro's number

Question

J.J.Thomson's experiment, involving the motion of an electron beam in mutually perpendicular  and  fields, gave the value of:
A)the mass of an electron 
B)the charge of an electron 
C)the Earth's magnetic field 
D)the charge/mass ratio for an electron 
E)Avogadro's number

Quizplus · Accepted Answer

J.J. Thomson's experiment involved the motion of an electron beam in mutually perpendicular electric and magnetic fields. By varying the strength of the fields, Thomson was able to determine the charge-to-mass ratio of the electron. This value was found to be -1.76 x 10^11 C/kg, providing the first experimental evidence for the existence of the negatively charged electron. This experiment did not directly determine the mass or charge of an electron, the Earth's magnetic field, or Avogadro's number.

JJThomson's Experiment, Involving the Motion of an Electron Beam in Mutually