Electric Currents (Part 3)

Match each description to the type of material.

• Insulator

• 
• Semiconductor

• 
• Conductor

• 

Tags

NGSS.MS-PS2-3

Order the three types of materials from least conductive to most conductive.

1 being the least conductive and 3 being the most conductive.

• conductor

• semiconductor

• insulator

An engineer is tasked with designing a power cord that needs to carry electric charges very long distances. Which type of material should she use?

• Plastic or rubber
• Wood or paper
• Glass or ceramic
• Copper or aluminum

Tags

NGSS.MS-ETS1-1

Technicians who repair power lines usually wear gloves.

What kind of material would be best for these gloves and why?

• Nylon
• Cotton
• Rubber
• Leather

Technicians who repair power lines usually wear gloves. Technicians should use gloves which do not allow electric current to ​ (a)   through easily. ​ (b)   , such as rubber, would ​ (c)   electric charges from passing ​ (d)   easily.

• pass
• Insulators
• prevent
• through

​ (a)   are a type of material where electric charges can move very easily.

• Conductors
• Insulators
• Semiconductors
• Dielectrics

​ (a)   are a type of material where electric charges cannot move easily.

• Insulators
• Conductors
• Semiconductors
• Superconductors

​ (a)   are a type of material where electric charges can flow but not as easily as electrical conductors.

• Semiconductors
• Insulators
• Superconductors
• Dielectrics

What is the SI unit for voltage?

• Volt (V)

• Ampere (A)

• Ohm (Ω)

• Watt (W)

How is voltage similar to water pressure?

• Both determine the rate of flow in their respective systems.

• Both are measured in volts.

• Both are related to temperature.

• Both are forms of energy.