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BASICS E.C. (the resistor (the interpretation (The voltage actually tells…
BASICS E.C.
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voltage
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definition of voltage
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1 V corresponds to 1 joule per coulomb, or 1 V = 1 J/C.
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the resistor
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the interpretation
The larger this current, the faster the electrons move through the resistor.
The voltage actually tells us how much energy (per unit of charge) is needed to achieve a given current through a given resistor.
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the resistor
Electric currents can go through resistors, from one lead to the other, if a voltage is applied across the two leads.
the resistor defined
the ratio of voltage over current is constant, VR = IR.R
The value of this constant is called the resistance.
Ohms law: that for most materials, the resistance is constant over a wide range of voltages.
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