this post was submitted on 21 Apr 2026
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i am more confused
It's a reference to this image that has been shared in so many different schools around the world:
Current (measured in amperes, or amp) is the flow of charge. emf (volts) is the energy supplied to a circuit per coulomb of charge (coulombs being the unit of charge. Current is coulombs per second). Resistance (measured with ohms) restricts the flow of charge (conductors have low resistivity, insulators are high. Resistance increases with length and decreases with crosd-sectional area)
Ohm's law is V = IR (or, with current isolated, I = V / R)
How so?