☑ What Affects Resistance Of A Resistor

In this activity you will use pencil lead as a resistor and manipulate it to test how certain variables affect the value of the resistance. Higher temperature higher resistance because.

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Resistor tolerance is a measure of the resistors variation from the specified resistive value and is a consequence of the manufacturing process and is expressed as a percentage of its nominal or preferred value.

What affects resistance of a resistor. Any time you are doing a lab investigation you should have best lab practices in mind. Four factors affecting resistance 1. The longer the resistor the more resistance it has.

The function of a resistor is to oppose the electric current through it. The resistance can be calculated with ohms law when the current is known and the voltage drop is measured. The length of the resistor affects how much resistance it offers to the circuit.

What its made of. The resistance r in ohms w of a resistor is equal to the resistivity r in ohm meters wm times the resistors length l in meters m divided by the resistors cross sectional area a in square meters m 2. Dimensions and material affects.

If you have access to the internet for your students then you can do an online simulation. This is called electrical resistance and is measured in the unit ohm. Recall any good lab practices you have learned in previous years of science.

Typical resistor tolerances for film resistors range from 1 to 10 while carbon resistors have tolerances up to 20. Resistance of a resistor. The resistance of a resistor is dependent on its material and shape.

The shorter the resistor the less resistance it has. Length the longer the greater resistance. Metals are good conductors so have lower resistance than an insulator.

Area of cross section the larger the lower.