What is OHM'S LAW? Write the mathematical equation for V, I, R also draw the circuit used for its verification?
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According to this law current flow through a conductor is directly proportional to the potential difference applied across the ends of a conductor.
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This picture is the easiest way that I’ve found to understand Ohm’s law.
Ohm’s law describes the amount of resistance the current has to face while it travels between two points.
Definition: Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, given that the physical conditions such as length of wire, temperature etc remains constant.
★Statement of Ohm's Law
Whenever we apply a potential difference i.e. voltage across a resistor of a closed circuit, current starts flowing through it.
》The statement of Ohms law says that
This current (I) is directly proportional to the voltage (V) applied, provided temperature and all other factors remain constant. 》Mathematically,
V=IR
R = V/I
Where, R is constant of proportionality. This equation presents the statement of Ohm law.
Here, we measure current in Ampere (or amps), voltage in unit of volt. The constant of proportionality R is the property of the conductor, we know it as resistance and measure it in ohm (Ω).
》Theoretically, the resistance has no dependence on the voltage applied, or on the flow of current. The value of R changes only if the conditions (like temperature, diameter and length etc.) of the resistor are changed by any means.
The basic circuit diagram for the performing the Ohm’s law experiment is:
1》Practical applications of Ohm’s law
2》Practically the law comes handy where we want to calculate either of voltage, current, or resistance from other two provided quantities.
2》Ohmic vs Non Ohmic components [Scope of the law]
》》Electronic Components which follow the Ohm’s law are known as ohmic components whereas those who disobey the Ohm’s law are non-ohmic components.
One can easily identify their components from their voltage-current graph. If the VI characteristics of object are straight line, they are ohmic. Otherwise they are non-ohmic
》In physics, the term Ohm's law is also used to refer to various generalizations of the law originally formulated by Ohm. The simplest example of this is:
J = σE
where J is the current density at a given location in a resistive material, E is the electric field at that location, and σ (sigma) is a material-dependent parameter called the conductivity. This reformulation of Ohm's law is due to Gustav Kirchhoff
Ohm’s law describes the amount of resistance the current has to face while it travels between two points.
Definition: Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, given that the physical conditions such as length of wire, temperature etc remains constant.
★Statement of Ohm's Law
Whenever we apply a potential difference i.e. voltage across a resistor of a closed circuit, current starts flowing through it.
》The statement of Ohms law says that
This current (I) is directly proportional to the voltage (V) applied, provided temperature and all other factors remain constant. 》Mathematically,
V=IR
R = V/I
Where, R is constant of proportionality. This equation presents the statement of Ohm law.
Here, we measure current in Ampere (or amps), voltage in unit of volt. The constant of proportionality R is the property of the conductor, we know it as resistance and measure it in ohm (Ω).
》Theoretically, the resistance has no dependence on the voltage applied, or on the flow of current. The value of R changes only if the conditions (like temperature, diameter and length etc.) of the resistor are changed by any means.
The basic circuit diagram for the performing the Ohm’s law experiment is:
1》Practical applications of Ohm’s law
2》Practically the law comes handy where we want to calculate either of voltage, current, or resistance from other two provided quantities.
2》Ohmic vs Non Ohmic components [Scope of the law]
》》Electronic Components which follow the Ohm’s law are known as ohmic components whereas those who disobey the Ohm’s law are non-ohmic components.
One can easily identify their components from their voltage-current graph. If the VI characteristics of object are straight line, they are ohmic. Otherwise they are non-ohmic
》In physics, the term Ohm's law is also used to refer to various generalizations of the law originally formulated by Ohm. The simplest example of this is:
J = σE
where J is the current density at a given location in a resistive material, E is the electric field at that location, and σ (sigma) is a material-dependent parameter called the conductivity. This reformulation of Ohm's law is due to Gustav Kirchhoff
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