الظواهر الكهربائية - الأسئلة

General Information

• The document provides study notes for a physics course, specifically focused on electrical phenomena.
• The target audience is 3rd-grade high school students in Algeria.
• The course material covers concepts related to direct current (DC).

Unit Topics

• Electrical Phenomena: This unit encompasses a range of topics related to electricity.

Learning Objectives

• Understanding and applying electrical concepts to solve daily problems.
• Defining electrical phenomena concerning DC circuit operation.
• Utilizing concepts and laws of DC circuits and using measuring devices.
• Designing electrical circuits in DC, observing safety regulations.

Learning Activities

• Problem-solving: Understanding and applying concepts.
• Experimentation: Using measuring devices.
• Modeling: Drawing diagrams for circuits.
• Analysis: Interpreting results.

Specific Concepts

• Current: The flow of electric charge.
• Direct Current (DC): The unidirectional flow of electric charge.
• Current Intensity: The rate of flow of charge.
• Voltage: The measure of electrical potential difference.
• Resistance: The opposition to the flow of electric current.
• Electromotive Force (EMF): The energy provided by a source to move charge.
• Energy Conversions (Electric): The changes from electric energy to other forms.

Measuring Instruments

• Ammeter: Measures electric current.
• Voltmeter: Measures voltage.

Circuit Connections

• Series: Components connected end-to-end.
• Parallel: Components connected side-by-side.

Laws

• Kirchhoff's current law: Current entering a junction equals current leaving it.
• Kirchhoff's voltage law: The sum of voltages around a closed loop is zero.

Power and energy

• Power: Rate at which electrical energy is converted.

• Energy: Total amount of electrical energy converted over time.