Unit 2 - Electric Networks

Content

• Forces between charges (attraction and repulsion).
• Positive and negative charges.
• Static electricity.
• Symbols to draw circuits.
• Current is the flow of charges (electrons). Ampere as unit of current.
• Voltage is the amount of positive and negative charge maintained at the ends of a battery. This push and pull the mobile negative charges in the conductor. Volts as unit of voltage.
• Resistance is the measure of how difficult it is for charges to flow through a material.It´s the measure of how difficult it is for charges to flow through a material. Ohm as unit of resistance.
• Conductor (allow current to flow freely and insulator (do not allow current to flow) materials.
• Series and parallel circuits.

Skills and understanding

• Understand forces between charges (attraction and repulsion)
• Recognise that there are two kinds of charge positive and negative.
• Describe current as a flow of charge.
• Describe voltage as the amount of positive and negative charge maintained at the ends of a battery.
• Describe resistance as a material's opposition to the flow of electric current.
• Use the terms conductors and insulators correctly.