Testing Conductors and Insulators

In this lab video, the teacher demonstrates how to determine if common substances are conductors or insulators. Using a setup with a power source, alligator cables, and a light bulb, the teacher tests various materials. If the material conducts electricity, the light bulb turns on; if it doesn't, the bulb stays off. Materials tested include aluminum, carbon, ceramic, copper, glass, iron, paper, plastic, and wood. The video concludes with a summary of the findings.

What is the main objective of the lab experiment discussed in the video?

• To determine the color of different substances

• To find out if substances are conductors or insulators

• To test the temperature resistance of substances

• To measure the weight of various materials

What is the voltage of the power source used in the experiment?

• 12 volts

• 5 volts

• 3 volts

• 10 volts

What indicates that a material is a conductor in the experiment?

• The power source turns off

• The material melts

• The light bulb turns on

• The material changes color

Which material was tested first in the experiment?

• Ceramic

• Aluminum

• Carbon

• Copper

What was the result when carbon was tested?

• The light bulb turned on

• The light bulb stayed off

• The material melted

• The power source turned off

Which material did not conduct electricity, keeping the light bulb off?

• Ceramic

• Iron

• Aluminum

• Copper

What was observed when glass was tested?

• The light bulb turned on

• The power source turned off

• The light bulb stayed off

• The material changed color

Which of the following materials is a conductor?

• Paper

• Wood

• Plastic

• Iron

What was the result when paper was tested?

• The light bulb turned on

• The power source turned off

• The light bulb stayed off

• The material melted

What confirms the setup is working correctly at the end of the experiment?

• The light bulb changes color

• The power source turns off

• The light bulb turns on when clips are connected

• The materials start to melt