Arduino Lesson 4 - Ohms Law

Renmark Salalila

30 Oct 202015:42

Summary

TLDRIn this educational video, the concept of Ohm's law is explained in simple terms. The law describes the relationship between voltage, current, and resistance, which can be represented through formulas. The video covers the basic principles, including key figures like George Ohm and Andre Ampere, who contributed to its development. Practical examples are given, such as calculating voltage and current using Ohm's law and solving related problems. The video encourages viewers to learn more about electrical concepts, offering a clear and engaging explanation with visual aids and examples.

Takeaways

😀 Ohm's law is the relationship between voltage, current, and resistance.
😀 Ohm's law was developed by German physicist George Ohm through extensive experiments.
😀 Voltage (V) is equal to the current (I) multiplied by the resistance (R). Formula: V = I * R.
😀 The symbol 'I' represents current, named after French physicist André Ampère.
😀 Voltage (V) is also known as electromotive force (emf), which can be symbolized as 'E' in some cases.
😀 To find voltage, use the formula V = I * R, where I is current and R is resistance.
😀 To find current, divide voltage (V) by resistance (R), formula: I = V / R.
😀 The resistance is measured in ohms, and the current in amperes (A).
😀 A real-life example: If the current is 2 amperes and the resistance is 3 ohms, the voltage is 6 volts.
😀 Another example: If the voltage is 6 volts and the resistance is 3 ohms, the current is 2 amperes.
😀 The video concludes with a reminder to like, subscribe, and hit the notification bell for future lessons.

Q & A

What is Ohm's Law?
-Ohm's Law is the relationship between voltage, current, and resistance in an electrical circuit. It states that voltage (V) is equal to the current (I) multiplied by the resistance (R), represented by the formula V = I × R.
Who developed Ohm's Law?
-Ohm's Law was developed by German physicist Georg Ohm, who conducted experiments to understand the relationship between voltage, current, and resistance.
What is the formula for Ohm's Law?
-The formula for Ohm's Law is V = I × R, where V is the voltage, I is the current, and R is the resistance.
What does the letter 'V' represent in Ohm's Law?
-'V' represents voltage, which is the potential difference that drives the flow of current through a circuit.
What does the letter 'I' represent in Ohm's Law?
-'I' represents current, which is the flow of electric charge in a circuit, and is measured in amperes.
What does the letter 'R' represent in Ohm's Law?
-'R' represents resistance, which is the opposition to the flow of current in a circuit, and is measured in ohms.
Why is the letter 'I' used to represent current?
-The letter 'I' is used to represent current because it is derived from the French word 'intensité,' meaning intensity of current, and was introduced by physicist André Ampère.
How did André Ampère contribute to the development of electrical concepts?
-André Ampère, a French physicist, conducted experiments with electric currents and developed the concept of the ampere, which is the unit of electric current. His work also influenced the standardization of the symbol 'I' for current.
How do you calculate the voltage in a circuit using Ohm's Law?
-To calculate the voltage (V) in a circuit, use the formula V = I × R. Multiply the current (I) by the resistance (R). For example, if the current is 2 amperes and the resistance is 3 ohms, the voltage is 6 volts.
How do you find the current in a circuit using Ohm's Law?
-To find the current (I) in a circuit, use the formula I = V ÷ R. Divide the voltage (V) by the resistance (R). For example, if the voltage is 6 volts and the resistance is 3 ohms, the current is 2 amperes.