Are Voltage And Current Always Proportional? Exploring Electrical Relationships

## Ohms Law – Directly Vs Inversely Proportional – For Electricians

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## Is Voltage Always Directly Proportional To Current?

Is voltage always directly proportional to current? To answer this question, we need to delve into Ohm’s Law, which elucidates the intricate interplay among current (I), voltage (V), and resistance (R) in an electrical circuit. Ohm’s Law firmly asserts that, when the temperature remains constant, the current flowing through a circuit is directly proportional to the voltage applied across it and inversely proportional to the resistance within that circuit. In simpler terms, if you increase the voltage, the current will also increase, as long as the resistance doesn’t change. Conversely, if you augment the resistance, the current will decrease for a given voltage. This fundamental principle underpins our understanding of electrical circuits and helps us make precise predictions about their behavior.

## Why Is Voltage Not Proportional To Current?

The relationship between voltage and current is not strictly proportional, and it depends on how you change these parameters. Specifically, the relationship varies based on whether you adjust voltage while keeping the power source constant or if the power source is also subject to variation. When the power source remains constant, increasing the voltage will result in a decrease in current. To better understand this phenomenon, it’s essential to consider the power source’s stability or variability in conjunction with voltage adjustments.

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According to Ohm’s law, **voltage and current are directly proportional to each other if resistance is constant**. According to P=V*I, voltage and current are inversely proportional to each other if power is constant.The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that **the current flowing in a circuit is directly proportional to the applied voltage** and inversely proportional to the resistance of the circuit, provided the temperature remains constant.Actually, **it depends on how you increase the parameters** i.e. if you increase the voltage by keeping the power of the source constant or is it varying. If the power of the source is constant then the current would decrease when voltage increases.

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