establish current voltage relationship ohm's law for a metallic conductor and find its resistance
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Question - State ohm's law and relation between voltage, current and resistance. Find out resistance using ohm's law in a wire of resistance R, which has current of 2 Amp flowing through it. The voltage source is 220V.
Ohm's law was given by German physicist named Ohm. The law is for current carrying conductors.
The law states the current flowing in a conductor of resistance R is directly proportional to the voltage applied.
It is mathematically represented as - V= IR. In this equation, V is voltage, I is current and R is resistance.
Example for metallic conductor is -
Let's say there is a wire of resistance R, which has current of 2 Amp flowing through it. The voltage source is 220V. Find the value of R.
It will be solved by Ohm's law. V = 220V, I = 2Amp.
V = IR.
R = V/I
R = 220/2
R = 110 ohm.
Hence, resistance of wire is 110 ohm.