Class 12 Physics (India): Current direction
Description
The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin named electric charges with + and - signs. This convention came about 150 years before the discovery of the electron.
Class 12 Physics (India)
It is now time to dive deeper into the world of physics with topics from class 12 (NCERT) such as electrostatics, electricity, magnetism, electromagnetic induction, and electromagnetic waves. Let's also learn more about light with ray optics an…
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The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin named electric charges with + and - signs. This convention came about 150 years before the discovery of the electron.
Class 12 Physics (India)
It is now time to dive deeper into the world of physics with topics from class 12 (NCERT) such as electrostatics, electricity, magnetism, electromagnetic induction, and electromagnetic waves. Let's also learn more about light with ray optics and wave optics. Finally, let's look at what happened in the last hundred years of physics by getting introduced to quantum mechanics with dual nature of radiation and matter, atoms, nuclei, and semiconductors.
Electric current and voltage
Topic: Science
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