{"id":1541,"date":"2022-11-18T10:00:25","date_gmt":"2022-11-18T04:30:25","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=1541"},"modified":"2022-11-19T09:54:40","modified_gmt":"2022-11-19T04:24:40","slug":"ohms-law","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/ohms-law\/","title":{"rendered":"What is the Ohm’s law?"},"content":{"rendered":"

What is the Ohm’s law?<\/h2>\n
    \n
  1. The proportional relationship of the potential difference between the ends of an ideal conductor and the current passing through it is known as Ohm\u2019s law<\/strong>.<\/li>\n
  2. Ohm\u2019s law<\/strong> states<\/strong> that the current passing through an ideal conductor is directly proportional to the potential difference between its ends, provided that the temperature and other physical factors of the conductor are kept constant.<\/li>\n
  3. Definition:<\/strong> According to the Ohm\u2019s law at constant temperature, the current flowing through a conductor is directly proportional to the potential difference across the conductor.<\/li>\n
  4. Thus, if I is the current flowing through a conductor and V is the potential difference (or voltage) across the conductor, then according to Ohm\u2019s law.
    \nI \u221d V (when T is constant)
    \n\\(I=\\frac{V}{R}\\text{ \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0}…..\\text{ (i)}\\)
    \nwhere R is a constant called the resistance of the conductor.
    \nEquation (i) may be written as,
    \nV = I \u00d7 R \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0…… (ii)<\/li>\n
  5. Unit of resistance:<\/strong>
    \nThe SI unit of resistance (R) is ohm. Ohm is denoted by the Greek letter omega (\u2126).
    \n\\( \\text{From Ohms law,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }R=\\frac{V}{I} \\)<\/li>\n
  6. Now, if, V = 1 volt and I = 1 ampere
    \n\\( \\text{Then,\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }R=\\frac{\\text{1}\\,\\text{volt}}{\\text{1}\\,\\text{ampere}} \\)
    \nThus, 1 ohm is defined as the resistance of a conductor which allows a current of 1 ampere to flow through it when a potential difference of 1 volt is maintained across it.<\/li>\n
  7. Results of Ohm\u2019s law<\/strong>
    \nCurrent flowing through a conductor is directly proportional to the potential difference across the conductor.
    \n\"What<\/li>\n
  8. When the potential difference in a circuit is kept constant, the current in inversely proportional to the resistance of the conductor.
    \n\\( I\\propto \\frac{1}{R} \\)<\/li>\n
  9. The ratio of potential difference to the current is constant. The value of the constant is equal to the resistance of the conductor (or resistor).
    \n\\( \\frac{V}{I}=R \\)<\/li>\n<\/ol>\n

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