Quick Answer: What Does Not Affect A Material’S Resistance?

What affects a material’s resistance?

Factors That Affect Resistance How much resistance a material has depends on several factors: the type of material, its width, its length, and its temperature.

All materials have some resistance, but certain materials resist the flow of electric current more or less than other materials do..

How do you increase the resistance of a wire?

The resistance in a wire increases as:the length of the wire increases.the thickness of the wire decreases.

Which copper wire has the smallest resistance?

Resistance increases as length increases and cross- sectional area decreases, so case 3, with the longest length and smallest cross-sectional area, has the largest resistance. Case 2 has the smallest resistance because it has the smallest length and the largest area.

How do I calculate resistance?

The resistance R in ohms (Ω) is equal to the voltage V in volts (V) divided by the current I in amps (A): Since the current is set by the values of the voltage and resistance, the Ohm’s law formula can show that if you increase the voltage, the current will also increase.

How do you find equivalent resistance?

The method we use to calculate equivalent resistance is different for each type of circuit. For a series circuit, we simply add up the resistances of each component. However, in a parallel circuit, the reciprocal of the total resistance is equal to the sums of the reciprocals of the resistances of each branch.

Does diameter affect resistance?

Resistance is inversly proportional to the diameter of the of cross section section of a conductor . Because when diameter will large then the area of cross section will large and electrons can move more freely hence the resistance wiil reduce .

What is the lowest resistance metal?

PlatinumPlatinum is the lowest resistivity-metal. It is a metal rarely found on earth. It doesn’t form resistive film on its surface.

Which of the following does not affect the resistance of a wire?

where �� – electrical resistivity (depend on material) �� – cross-section area of the wire (depend on diameter) �� – length of wire. The only item not listed here is voltage. Voltage value is not affect resistance (if we will not take into account any temperature changes).

What is resistance and what factors affect it?

Resistance 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 wire, and nature of the material.

How do you reduce resistance in a circuit?

To reduce the circuit to its equivalent resistance, start at the end opposite the source (Emf). Here are the steps: Step 1: Add R2 and R3 in SERIES to get a total of 20 Ohms. Step 2: Add the result of step 1 with R5 in PARALLEL to get 6.7 Ohms.

What affects resistance of a wire?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. There is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. … Wider wires have a greater cross-sectional area.

Does a thicker wire have more resistance?

A thicker wire simply has more ‘lanes’ on the go at once. A higher current for a given voltage means a lower resistance. The thicker wire in (4) has a lower resistance than the thinner wire in (3). The resistance of a wire decreases with increasing thickness.

Does resistance depend on material?

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.

Why does copper have a low resistance?

Pure copper has less resistance than copper containing impurities. Impurity atoms are a different size to copper atoms, so they get in the way of moving electrons. … Once the ions are vibrating, they hinder the flow of the electrons. This is because the electrons will be scattered off the vibrating ions.

Which of the following wires would have the most resistance?

In short and thick wire, area is more and length is lesser. In long and thin wire, area is less and length is more. Considering the above proportionality, long and thin wire will have higher resistance.

Which type of wire would have the least resistance?

A short wire has a lower resistance than a long one*. Resistance is directly proportional to the length of the path through which current flows: R ∝ L. This means the longer the wire, the more resistance.

What is the thickest wire?

Gauge Thickness chart & Information:Gauge -ThicknessDimension inches thickDimension millimeters thick30.010 also known as 10 mil as it is 10/1000 inch thick.25 mm 1/4 mm36.005 also known as 5 mil as it is 5/1000 inch thick.125 mm 1/8 mm38.004.101 mm45-50.0014 .000715 more rows

What are 4 factors affecting resistance in a wire?

There are several factors that affect the resistance of a conductor;material, eg copper, has lower resistance than steel.length – longer wires have greater resistance.thickness – smaller diameter wires have greater resistance.temperature – heating a wire increases its resistance.