The video tutorial explains the properties of cathode rays through various experiments. Cathode rays travel in straight lines, as demonstrated by the shadow of a metal object. They are negatively charged, shown by their deflection towards positively charged plates in an electric field and their behavior in a magnetic field. The fluorescence observed when cathode rays pass through a perforated anode further supports their properties. The particle nature of cathode rays is confirmed by the rotation of a paddle wheel, indicating they have mass and momentum. Overall, cathode rays consist of negatively charged particles.

What observation led to the conclusion that cathode rays travel in straight lines?

• The shadow of a metal object was seen on the glass wall.

• Cathode rays were deflected by a magnetic field.

• A paddle wheel rotated when struck by cathode rays.

• Green light flashes were observed on a zinc sulfide screen.

What phenomenon occurs when cathode rays pass through a perforated anode?

• Formation of a shadow on the glass wall

• Deflection towards a positively charged plate

• Rotation of a paddle wheel

• Flashes of green light on a zinc sulfide screen

How do cathode rays behave in an electric field?

• They are deflected towards the positively charged plate.

• They are unaffected by the electric field.

• They move in a circular path.

• They are deflected towards the negatively charged plate.

What happens to cathode rays when exposed to a magnetic field with the North Pole pointing towards them?

• They are deflected away from the North Pole.

• They remain in a straight line.

• They form a shadow on the glass wall.

• They are deflected towards the North Pole.

What does the rotation of a paddle wheel in the path of cathode rays indicate?

• Cathode rays have particle nature with mass.

• Cathode rays have wave-like properties.

• Cathode rays travel in a circular path.

• Cathode rays are positively charged.