States that "the voltage across the various types of materials are proportionate with the straight flow of the stream." Mathematically expressed by:
![Hukum Ohm](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg435XRepK3KyE0QjZ6C9mE2tSAor4nR46FFHEKOT589EHzhYCzz09dspFMYo1zT7WTWxJJbHHWLLLxdVtdEf05G4FEKGSaDPxRq6vCNPJy2x5C0qr4-MJmdVNfzbtgXMF1dRq6s7iml6o/s400/Hukum+Ohm.jpg)
Ohm's law formula can be derived as follows:
![Hukum Ohm](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiR_NefahrVTark9-0DVIJvnnpkqB0t3GqWK5GemEy_kQ9BgANUMlz6RA8i2XNjV83CR7jQ0NN_ijj2E7U3ThYp0Zggt_dSKnu0-BIABCjUtN4iggQ2Pq8jsldptt6EYQ8Q9ICvNHsD2Z0/s400/Hukum+ohm+2.jpg)
V is the voltage (in volt), I is the current that flows (in ampere) and R is resistansi or obstacles (in ohm, Ω) which is 1 ohm value is equal to 1 volt / ampere.
Resistansi is a measure of how large flow by preventing elements. Reverse of resistansi (1 / Ω, S) is called with konduktansi (G). Konduktansi is a measure of how good flowing currents akan allowed in the series. The mathematical relationship between resistansi and konduktansi stated with
![Hukum Ohm](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWaIzRJ8UJnYySlnCxfi9TrKAQCXExJfVi7Y-gvwEGHGqELqkgnr0tRaDaoVxgPj9eFgX7vMJLBdcbCP4zRwEBHHI2EhfQAhTZtDGHOS7i6JtI0kdiztL0OIVnqvZghyGdbZKZZG75R_4/s400/Hukum+ohm+3.jpg)
Example 1
Determine the current that flows in the series when a 12 volt battery is connected with a resistor of 2 Ω!Answer:
![Hukum Ohm](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6qmyBgtDwDAE0RZYXPUhZuUIbegIgA8vgpoMBU3ZFpjE2g-BTfX_3EzvJF2_Z4W8SkeM_K2SY4rqHfA7H4b_Ph-lkExlfWh3YmV8H1tXA_JFlB382tEFZB_03qdLHtgc_xoHrMemBVrQ/s400/Hukum+ohm+4.jpg)
Example 2
Specify resistansi of 44 fluorescent light wall W, which when connected with the voltage of 220 V will then flow currents of 200 mA!Answer:
![Hukum Ohm](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjft6ez6Z37FtJFKHW41SeVnMYxkVOD068QFnymeKWHG4fvwNzOkHbpOa93A0I_fGrTCu76JzrPrV4Hs8C3jnx4fO8SGUxfD4eCFK1soAcAdGTDxMxKc-tVBNlI77p-glIoLqpGBNx0rjs/s400/Hukum+ohm+5.jpg)
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