PHY202 — Introduction to Electric Circuits and Electronics

About this course

PHY202 Introduction to Electric Circuits and Electronics is a 200 Level course in the Physics department, taught in the Second Semester. On La-Net Hub you can watch all 30 recorded lectures for free, grouped into 10 series, read the course lecture note online or download it as a PDF, and test yourself with practice questions.

Alternating current (AC) refers to the flow of electric charge that periodically reverses direction, typically following a sinusoidal waveform, which makes it highly efficient for transmitting electrical energy over long distances. The behavior of AC in circuits depends on components such as resistors, capacitors, and inductors, which influence voltage, current, and phase relationships. Power in AC circuits is expressed in terms of real power (usable energy), reactive power (stored and released energy), and apparent power, all of which determine overall efficiency. Transformers play a crucial role in AC systems by using electromagnetic induction to step voltage levels up or down, enabling safe and efficient distribution of electricity from power plants to homes and industries.

Alternating current (AC) behaviour refers to the way electric current periodically reverses direction and varies in magnitude over time, typically following a sinusoidal waveform, which enables efficient transmission of electrical energy over long distances with reduced losses. In AC circuits, power is characterized by concepts such as real power (used to perform work), reactive power (stored and released by inductors and capacitors), and apparent power (the combined effect of both), often analyzed using phase relationships between voltage and current. Transformers play a crucial role in AC systems by using electromagnetic induction to step voltage levels up or down, thereby improving power transmission efficiency and making it suitable for safe distribution and consumption; their operation relies on the changing magnetic flux produced by alternating current, which would not function with direct current.

Lectures in this course

Series 1: Alternating Current Behavior, Power, And Transformers (series 4)

1. Alternating Current Behavior, Power, And Transformers 1 7 minutes 56 seconds
2. Alternating Current Behavior, Power, And Transformers 2 8 minutes 43 seconds
3. Alternating Current Behavior, Power, And Transformers 3 8 minutes 13 seconds

Series 2: Alternating Current Behaviour, Power, and Transformers (series 4)

1. Alternating Current Behaviour, Power, and Transformers 1 7 minutes 20 seconds
2. Alternating Current Behaviour, Power, and Transformers 2 8 minutes 2 seconds
3. Alternating Current Behaviour, Power, and Transformers 3 7 minutes 36 seconds

Series 3: Analysing Direct and Alternating Current Circuits (series 2)

1. Analysing Direct and Alternating Current Circuits 1 8 minutes 44 seconds
2. Analysing Direct and Alternating Current Circuits 2 9 minutes 13 seconds
3. Analysing Direct and Alternating Current Circuits 3 10 minutes 15 seconds

Series 4: Analysing Direct and Alternating Current Circuits (Series 2)

1. Analysing Direct and Alternating Current Circuits 1 8 minutes 1 second
2. Analysing Direct and Alternating Current Circuits 2 8 minutes 30 seconds
3. Analysing Direct and Alternating Current Circuits 3 9 minutes 28 seconds

Series 5: Circuit Theorems, Techniques, and Network Analysis (series 3) · Part 1

1. Circuit Theorems, Techniques, and Network Analysis 1 8 minutes 55 seconds
2. Circuit Theorems, Techniques, and Network Analysis 2 8 minutes 46 seconds
3. Circuit Theorems, Techniques, and Network Analysis 3 8 minutes 19 seconds

Series 6: Circuit Theorems, Techniques, and Network Analysis (series 3) · Part 2

1. Circuit Theorems, Techniques, and Network Analysis 1 8 minutes 12 seconds
2. Circuit Theorems, Techniques, and Network Analysis 2 8 minutes 5 seconds
3. Circuit Theorems, Techniques, and Network Analysis 3 7 minutes 42 seconds

Series 7: Fundamentals of Circuit Diagrams and Laws (series 1)

1. Fundamentals of Circuit Diagrams and Laws 1 8 minutes 40 seconds
2. Fundamentals of Circuit Diagrams and Laws 2 9 minutes 17 seconds
3. Fundamentals of Circuit Diagrams and Laws 3 8 minutes 11 seconds

Series 8: Fundamentals of circuit diagrams and laws (series 1)

1. Fundamentals of circuit diagrams and laws 1 8 minutes 3 seconds
2. Fundamentals of circuit diagrams and laws 2 8 minutes 36 seconds
3. Fundamentals of circuit diagrams and laws 3 7 minutes 34 seconds

Series 9: Semiconductors and Electronic Devices (series 5)

1. Semiconductors and Electronic Devices 1 10 minutes
2. Semiconductors and Electronic Devices 2 9 minutes 58 seconds
3. Semiconductors and Electronic Devices 3 9 minutes 38 seconds

Series 10: semiconductors and Electronic Devices (series 5)

1. semiconductors and Electronic Devices 1 9 minutes 13 seconds
2. semiconductors and Electronic Devices 2 9 minutes 7 seconds
3. semiconductors and Electronic Devices 3 8 minutes 55 seconds

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