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Ohm’s Law

Ohm’s Law. German Physicist Georg Simon Ohm found that: For a fixed resistance, current is directly proportional to voltage a. if voltage increases, current increases b. if voltage decreases, current decreases

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Ohm’s Law

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  1. Ohm’s Law • German Physicist Georg Simon Ohm found that: • For a fixed resistance, current is directly proportional to voltage • a. if voltage increases, current increasesb. if voltage decreases, current decreases • For a fixed voltage, current is inversely proportional to resistancea. if resistance increases, current decreasesb. if resistance decreases, current increases • These relationships are known as “Ohm’s Law” EGR 101

  2. As voltage increases, current increases EGR 101

  3. As resistance increases, current decreases EGR 101

  4. Ohm’s Law …. 3 Forms Calculate Current Calculate Voltage Calculate Resistance where I = the circuit current V = the applied voltage R = the circuit resistance EGR 101

  5. A Graphical Helper V = IR V R I R = V/I I = V/R EGR 101

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