Question

Derive ohms law with proper explanation​

Answer 1

Answer :-

Ohms law states if the physical condition like temperature etc of a conductor are kept unchanged, the strength of current flowing through it is directly proportional to the potential difference across it's ends

Fundamental relation of ohms law :-

V = RI

• V = Potential difference

• R = Electric resistance

• I = Current

Let's understand ohms law with an Example :-

[Refer the circuit given in the attachment]

• A battery which is used to send current in the circuit

• A rheostat is used in circuit to adjust the current

• A resistance of wire AB of fixed resistance R

• An ammeter is connected in the circuit.

• A voltmeter is connected in the circuit

• A plug key is connected in circuit to open or close the circuit.

Conclusion :- When plug key is closed, A current starts flowing in the circuit. The current in the circuit is changed by adjusting the rheostat and the readings of V and A are taken. These readings gives is the value of potential difference across R and The current flowing through it.

So, It is found that V/I is constant

or V is proportional to I

This verifies ohms law

Another Example ( B) :-

If we plot a graph between different values of V and I , we get a straight line passing through the origin. This also verifies ohms law. This is due to the reason that a straight line of graph passing through the origin between two variables quantities signifies that the quantities are proportional to each other$.$

Answer 2

${ \large{ \sf{ \underbrace{\underline{\bigstar \:Basic\: :-}}}}}$

$\leadsto$Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit.

$\bold\color{magenta}{\boxed{It's\: formula\: V\: =\: IR}}$

${ \large{ \sf{ \underbrace{\underline{\bigstar \:Ohm’s\: Law \:Definition :-}}}}}$

$\leadsto$Most basic components of electricity are voltage, current, and resistance. Ohm’s law shows a simple relation between these three quantities. Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

${ \large{ \sf{ \underbrace{\underline{\bigstar \:Ohm’s \:Law\: Formula}}}}}$

${ \large{ \boxed{ \red{ \underline{ \bf \:Voltage= Current × Resistance}}}}}$

$\mapsto\bf{V=}$$\sf\color{red}$ I×R

$\mapsto\bf{V=}$$\sf\color{green}voltage,$

$\mapsto\bf{I=}$$\sf\color{mangeta}current$

$\mapsto\bf{R=}$$\sf\color{olive}resistance$

$\bold\color{magenta}{\boxed{The\: SI \:unit \:of \:resistance\: is\: ohms}}$

$\bold\color{magenta}{\boxed{denoted\: by \:Ω}}$

${ \large{ \sf{ \underbrace{\underline{\bigstar \:Applications\: of \:Ohm’s\: Law}}}}}$

$\leadsto$Ohm’s law helps us in determining either voltage, current or impedance or resistance of a linear electric circuit when the other two quantities are known to us.

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Thankyou :)

You can also refer to the attachment :)