JJ Thomson determined the charge/mass ratio of the electron by constructing a device which contained
The Discovery of the Electron by J.J. Thomson

Quiz
•
Physics
•
12th Grade
•
Hard
Paul Looyen
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
perpendicular magnetic fields.
perpendicular electric and magnetic fields.
perpendicular electric fields.
parallel electric and magnetic fields.
Answer explanation
In order to generate forces in opposition the electric field needs to be perpendicular to the magnetic field.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did Crooks believe about the particles in the cathode ray tube?
They were a form of electromagnetic radiation.
They were positively charged.
They were negatively charged particles.
They were a form of light.
Answer explanation
Crooks believed that the particles in the cathode ray tube were negatively charged particles.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was J.J. Thomson able to determine by applying both electric and magnetic fields to the cathode ray?
The speed of light
The exact charge of the electron
The exact mass of the electron
The charge to mass ratio of the electron
Answer explanation
By applying both electric and magnetic fields to the cathode ray, J.J. Thomson was able to determine the charge to mass ratio of the electron.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What did J.J. Thomson's experiments conclude about the nature of cathode rays?
They could not be deflected by electric or magnetic fields.
They were made up of negatively charged particles, electrons.
They were made up of positively charged particles.
They were a form of electromagnetic radiation.
Answer explanation
Thomson's experiments concluded that cathode rays were made up of negatively charged particles, electrons.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What significant discovery did J.J. Thomson make regarding the cathode ray particle compared to the hydrogen atom?
It was 1800 times smaller.
It was the same size.
It had the same charge to mass ratio.
It was 1800 times larger.
Answer explanation
J.J. Thomson discovered that the cathode ray particle was 1800 times smaller than the hydrogen atom, highlighting the correct choice.
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