CBSE PHYSICS
Current
Like people, the most interesting charge is the charge that is in motion, moving about rather than sitting still.
Current
Like people, the most interesting charge is the charge that is in motion, moving about rather than sitting still.
Charge in motion is referred to as current.
Current can exist in many different physical forms because there are many different physical situations in which charge can flow.
The most common manifestation of charge in motion is the movement of electrons in a wire such as the wire leading to the computer that is running this lesson. That's one form of current.
However, ions in water carry charge and a current can flow in water with ions in solution. Standing in distilled (ion-free) water near an electrical outlet in your bathroom is nowhere near as dangerous as standing in tap water with some ionic content, but do not try the experiment.
Charged particles moving in a vacuum are another manifestation of current, and you experience that every time you watch television or look at a computer screen. Charged particles fly from an electron gun at the back of a picture tube or a monitor tube, strike the screen and you see the light emitted from the screen as a picture.
Even ink-jet printers charge the ink blobs in the jet, and the jet is an example of a current!
Current can exist in many different physical forms because there are many different physical situations in which charge can flow.
The most common manifestation of charge in motion is the movement of electrons in a wire such as the wire leading to the computer that is running this lesson. That's one form of current.
However, ions in water carry charge and a current can flow in water with ions in solution. Standing in distilled (ion-free) water near an electrical outlet in your bathroom is nowhere near as dangerous as standing in tap water with some ionic content, but do not try the experiment.
Charged particles moving in a vacuum are another manifestation of current, and you experience that every time you watch television or look at a computer screen. Charged particles fly from an electron gun at the back of a picture tube or a monitor tube, strike the screen and you see the light emitted from the screen as a picture.
Even ink-jet printers charge the ink blobs in the jet, and the jet is an example of a current!
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