JJ Thompson's CRT Experiment Quiz

What was the main significance of JJ Thompson's CRT experiment?

• It demonstrated the wave nature of light.

• It confirmed the atom as the smallest particle.

• It led to the discovery of the electron.

• It proved the existence of protons.

What are the main components of a cathode ray tube?

• A wooden tube with a cathode

• A solid metal tube with electrodes

• A hollow glass tube with a cathode and anode

• A plastic tube with a single electrode

What is the role of the fluorescent material in a cathode ray tube?

• To emit light when struck by cathode rays

• To absorb the cathode rays

• To deflect the cathode rays

• To generate cathode rays

Which of the following is NOT a property of cathode rays as concluded by JJ Thompson?

• They are streams of particles.

• They travel in straight lines.

• They carry a negative charge.

• They are dependent on cathode composition.

How did JJ Thompson modify the cathode ray tube to discover the electron?

• By increasing the temperature of the cathode

• By changing the shape of the tube

• By applying electric and magnetic fields

• By using a different gas inside the tube

What was the purpose of applying electric and magnetic fields in Thompson's experiment?

• To heat the cathode

• To deflect the cathode ray beam

• To increase the speed of cathode rays

• To change the color of the cathode rays

What did the charge-to-mass ratio calculated by JJ Thompson indicate about the particles in cathode rays?

• They had no mass.

• They were about 2,000 times lighter than hydrogen atoms.

• They were the same mass as hydrogen atoms.

• They were heavier than hydrogen atoms.

What was the calculated charge-to-mass ratio of the particles in cathode rays?

• -1.76 * 10^8 KS per gram

• -1.76 * 10^6 KS per gram

• 1.76 * 10^8 KS per gram

• 1.76 * 10^6 KS per gram

What was the implication of discovering that cathode rays were made of particles lighter than hydrogen?

• Atoms are indivisible.

• Atoms contain subatomic particles.

• Atoms are made of light.

• Atoms are heavier than previously thought.

What was the broader impact of JJ Thompson's CRT experiment on atomic theory?

• It confirmed the atom as the smallest unit.

• It led to the development of the plum pudding model.

• It disproved the existence of atoms.

• It showed that atoms are made of waves.