Quick Answer: How Does Resistance Depend On Length And Area?

How does resistance depend on length?

Resistance depends on an object’s size, shape, and material.

In Figure 3 below, the cylinder’s resistance is directly proportional to its length l.

The longer the cylinder, the higher the resistance.

Additionally, the resistance is inversely proportional to the cross sectional area A..

Does resistivity depend on length and area?

It is a property of the material itself, and depends on temperature. The resistance of an object is proportional to the resistivity of the material it is made from, proportional to the object’s length, and inversely proportional to the object’s cross-sectional area.

Why is resistance directly proportional to length?

Directly proportional ; as the length of the wire increases , its resistance increases. Why? Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance.

Is current dependent on resistance?

Current tends to move through the conductors with some degree of friction, or opposition to motion. This opposition to motion is more properly called resistance. The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow.

On what factors resistance depends upon?

Since the resistance of some conductor, such as a piece of wire, depends on collisions within the wire itself, the resistance depends on temperature. With increasing temperature, the resistance of the wire increases as collisions within the wire increase and “slow” the flow of current.

What is the relation between resistance and current?

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.

How many factors are dependent on the resistance?

four factorsResistance is the property of the material that restricts the flow of electrons. There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.

Does resistance depend on pressure?

Resistance is proportional to how much pressure is required to achieve a given flow, while conductance is proportional to how much flow occurs for a given pressure. Conductance and resistance are reciprocals. The resistance of an object depends on its shape and the material of which it is composed.

What is a specific resistance?

Specific resistance is defined as the resistance offered per unit length and unit cross-sectional area when a known amount of voltage is applied.

Is Temperature directly proportional to resistance?

The resistance increases as the temperature of a metallic conductor increase, so the resistance is directly proportional to the temperature.

What is the relation between resistivity and resistance?

The resistance of a cylindrical segment of a conductor is equal to the resistivity of the material times the length divided by the area: R≡VI=ρLA. The unit of resistance is the ohm, Ω. For a given voltage, the higher the resistance, the lower the current.