The video lesson introduces students to electrical circuits, explaining their components and functions. It covers the law of conservation of energy, static electricity, and the flow of electrons. The lesson details the components of a simple circuit, including power supply, conduant path, and load, and explains the symbols used in circuit diagrams. It also discusses conductors and insulators, providing examples and safety tips. The lesson concludes with an activity to identify conductors and insulators.

What is the law of conservation of energy?

• Energy is always created.

• Energy is always destroyed.

• Energy can be created and destroyed.

• Energy can neither be created nor destroyed.

What is an electrical circuit?

• A path that is always open.

• A closed path that may be followed by an electrical current.

• A path that never conducts electricity.

• A path that only conducts heat.

Which component is used to convert electrical energy into light?

• A motor

• A battery

• A light bulb

• A switch

What does a voltmeter measure?

• Temperature

• Resistance

• Current

• Voltage or potential energy

Which symbol represents the positive side of a cell or battery?

• A long stroke

• A short stroke

• A square

• A circle

What is the purpose of a resistor in a circuit?

• To measure voltage

• To convert electrical energy into light

• To slow the flow of electrons

• To increase the flow of electrons

Which factor does NOT affect the flow of electrons?

• Temperature

• Length

• Material

• Color

What is a conductor?

• A material that stops the flow of electrons

• A material that allows the flow of electrons

• A material that only conducts heat

• A material that only conducts sound

Which of the following is an insulator?

• Eraser

• Copper wire

• Paper clip

• Metal pen

Why should you not insert metal objects into electrical outlets?

• They will break the outlet.

• They will melt.

• They can conduct electricity and cause a shock.

• They are too large to fit.