what is the relation between V and I ?
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divyedarshiny:
current (I)=Voltage (V) \ Resistance (R)
its about ohms law which states that potential difference across a the ends of a mettalic wire in an electric circuit is directly proportional to the current i flowing through it given its temprature remains the same
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Current is the flow of electrons flowing through a circuit. For simplicity, think of it as the number of electrons flowing through the circuit per second. It's measured in amperes, and is not really the number of electrons, but proportional to the number of electrons flowing through the circuit per second.
You can think of voltage, intuitively, as the force driving the electrons through the circuit, (although it’s not exactly the same as the physical concept force measured in Newtons). In a simple resistive circuit, a higher voltage means more current. That is another way of saying more force will drive more electrons through the circuit per second. So, you have:
I = V/R
I is current, V is voltage and R is resistance. This equation is called is Ohm's law.
Current is the rate at which the charge is flowing.
Voltage is the difference in charge between two points.
The relation between the current(I) and voltage(V) is provided by the Ohm’s law. It states that, the current is directly proportional to the voltage.
=> V α I
Now, we introduce a constant of proportionality (R)
i.e., V=IR
This is the relationship between the current(I), voltage(V) and the resistance(R) as defined by the Ohm’s law. This can be further manipulated into I=V/R and R=V/I whenever required.
Here R is the resistance, which is the material’s tendency to resist the flow of charge.
Ohm’s law is an empirical law - a generalisation from many experiments which have shown that, for many materials current is approximately proportional to electric field. But this won’t be obeyed in ‘all the cases’. Even some materials are categorised as ‘non-ohmic under weak fields’.
You can think of voltage, intuitively, as the force driving the electrons through the circuit, (although it’s not exactly the same as the physical concept force measured in Newtons). In a simple resistive circuit, a higher voltage means more current. That is another way of saying more force will drive more electrons through the circuit per second. So, you have:
I = V/R
I is current, V is voltage and R is resistance. This equation is called is Ohm's law.
Current is the rate at which the charge is flowing.
Voltage is the difference in charge between two points.
The relation between the current(I) and voltage(V) is provided by the Ohm’s law. It states that, the current is directly proportional to the voltage.
=> V α I
Now, we introduce a constant of proportionality (R)
i.e., V=IR
This is the relationship between the current(I), voltage(V) and the resistance(R) as defined by the Ohm’s law. This can be further manipulated into I=V/R and R=V/I whenever required.
Here R is the resistance, which is the material’s tendency to resist the flow of charge.
Ohm’s law is an empirical law - a generalisation from many experiments which have shown that, for many materials current is approximately proportional to electric field. But this won’t be obeyed in ‘all the cases’. Even some materials are categorised as ‘non-ohmic under weak fields’.
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