Why resistance does not depend on voltage and current?

Resistance doesn’t depends on voltage and current. It depends specific resistance of the material,cross section area of the material, length of the material and the room temperature.

Does potential difference change with resistance?

If the current encounters resistance, the electric potential difference decreases according to Ohm’s law.

Is potential difference directly proportional to resistance?

Ohm’s Law as a Predictor of Current The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit. And the greater the resistance, the less the current.

Why does the resistance increase as the potential difference increase?

The more energy that is put into the bulb, the harder it is for the current to flow – the resistance of the bulb increases. As the potential difference increases, so does the temperature of the thin wire inside the bulb, the filament.

Is there a relationship between the potential difference across a conductor and the current through it?

The relation between potential difference (V) and the current (i) through the conductor is V = iR, where R is the resistance of the conductor. According to Ohm’s law, the current flowing through a conductor is directly proportional to the potential difference across the conductor.

What is the resistance of a metallic conductor?

Resistance of a metallic conductor increases with the increase (or rise) in temperature, because the temperature coefficient of conductors is positive in nature hence resistance is directly proportional to the temperature.

Why does the resistance of a conductor increase with increase in temperature?

When temperature increases, the atoms in the structure of the conductor start vibrating more vigorously and hence offer an opposition to the flow of current. This increases the overall resistance of the material and hence the specific resistance also increases.

When a difference of potential is applied to a conductor current flows from?

Electrons move from higher potential to lower potential. When a conductor is connected to battery, electron move from negative terminal to positive terminal.

What is potential difference across the ends of a conductor?

potential difference in Electrical Engineering Ohm’s law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points. Potential difference is the work done in moving a unit of positive electric charge from one point to another.

How does voltage affect the resistance of a conductor?

Metals, such as those used as conductors, copper, aluminum, and etc, resistance varies with changes if temperature. Voltage doesn’t change that. Generally, as the temperature of a conductor rises, so does the resistance to current flow. Critical a high current densities.

What is the effect of voltage on current?

Voltage doesn’t change that. Generally, as the temperature of a conductor rises, so does the resistance to current flow. Critical a high current densities. More current causes more heat which causes higher resistance, which causes more current, which causes higher heat generation.

What happens when a current flows through a conductor?

Whenever a current flows through a conductor there is a heating effect. Electrical energy is converted to heat energy. To ensure the temperature of the wire does not increase, switch off between readings and keep the current as low as possible.

Why doesn’t voltage increase when you change the value of a resistor?

With most real world voltage sources, you should have seen the voltage across a resistor increase when you changed the resistor’s value. This is because real voltage sources are not ideal voltage sources, as I explained in my answer to your previous question. What are the physics behind this? Is there another law that covers this?