Lesson: Electrical Resistance Science

Students will be able to

• understand that electrical resistance is the opposition to the flow of charges within a conductor,
• understand that very large currents can cause wires to heat up,
• know that resistance can be measured in ohms,
• know that resistance can be measured using an ohmmeter,
• understand that if there is a potential difference across a component of one volt and the current through it has a value of one amp, then the resistance of the component is one ohm,
• identify the circuit symbol for a resistor,
• identify the circuit symbol for a variable resistor,
• understand that the resistance of a wire increases if the length of the wire increases.