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Belajar 43

22 Sept 202102:31

Summary

TLDRThis video explains the concept of electric current, highlighting how it arises due to potential differences across a conductor. The current depends on the power plant and the speed of electron movement, which is measured in amperes. The relationship between electric current, electric charge, and time is described using the formula q = i * t. Examples are provided to demonstrate how to calculate electric current and charge in various scenarios. The video offers an easy-to-understand explanation for viewers to grasp the basics of electric current.

Takeaways

😀 Electric current arises from the potential difference between two points in a conductor.
😀 The movement of electrons is pushed by the force created by the potential difference.
😀 The strength of the electric current depends on the power plant that produces the energy.
😀 The speed of the electric current's movement is called the current rate, measured in amperes (A).
😀 Electric current occurs when an electric charge flows through a conductor every second.
😀 The relationship between electric current (i), electric charge (q), and time (t) is expressed by the formula: i = q / t.
😀 In the formula, i is the electric current in amperes, q is the electric charge in coulombs, and t is the time in seconds.
😀 Example 1: If 15 coulombs of electric charge flows in 30 seconds, the electric current is 0.5 amperes.
😀 Example 2: If the electric current is 2 amperes for 20 seconds, the electric charge flowing is 40 coulombs.
😀 The key to calculating electric current or charge is knowing the values of time, current, and charge.
😀 Understanding the formula i = q / t allows us to solve real-world problems involving electric current and charge.

Q & A

What is electric current?
-Electric current arises when electrons move through a conductor due to a potential difference between the two ends of the conductor. This movement is driven by a force that pushes the electrons.
How is the size of the electric current determined?
-The size of the electric current depends on the power plant that produces the power and the conditions that influence the movement of electrons within the conductor.
What is the term used to describe the speed of electric current?
-The speed at which electric current moves is called the current rate, and it is measured in amperes.
What is the equation that relates electric charge, current, and time?
-The equation that relates electric charge (q), electric current (i), and time (t) is q = i * t, where 'i' is the current in amperes, 'q' is the charge in coulombs, and 't' is the time in seconds.
What is the unit of electric current?
-The unit of electric current is the ampere (A).
How is the electric charge calculated if the current and time are known?
-Electric charge (q) can be calculated by multiplying the current (i) by the time (t). This is expressed as q = i * t.
What is the value of electric current if 15 coulombs of charge flows in 30 seconds?
-The electric current can be calculated by dividing the charge (15 coulombs) by the time (30 seconds), resulting in an electric current of 0.5 amperes.
How much electric charge flows if 2 amperes of current flow for 20 seconds?
-The electric charge can be calculated by multiplying the current (2 amperes) by the time (20 seconds), resulting in a total charge of 40 coulombs.
What does the equation q = i * t represent?
-The equation q = i * t represents the relationship between electric charge (q), electric current (i), and time (t). It shows that the charge is the product of the current and the time over which the current flows.
How is the electric charge affected by the current and time?
-The electric charge increases as either the current or the time increases. A larger current or a longer time results in a greater electric charge.