Question

How do you determine the resistance of a resistor?

Answer 1

Resistor:

1. Resistors are a common component of electronics and nearly all electrical products. Look at the motherboard of your computer after taking it apart. Its surface is covered in resistors of different shapes and sizes.
2. A piece of material that obstructs the flow of electricity is called a resistor. The voltage and current passing through a system are managed by resistors. Without resistors, the excessive voltage flowing through your devices could cause them to burn out or overheat.

Determine resistance:

1. The resistance calculation formula, which can be interpreted mathematically as; takes into account the fact that a resistor's resistance is dependent on the material it is comprised of,

$\Rightarrow \mathrm{R}=\frac{\mathrm{\rho L}}{\mathrm{A}}$

Where$R=$ resistance, $\rho =$ the resistivity of the resistor's substance.$LandA=$ resistors' length and cross-sectional area, respectively. $Ohms$ are used to measuring resistance.

Ohms Law:

1. The Ohms law is a principle that governs how electricity flows across all electrical circuits. This law explains how the relationship between resistance and voltage and current works.
2. They follow the formula,

$\begin{array}{rcl}& \Rightarrow & \mathrm{V}=\mathrm{IR}\\ & \Rightarrow & \mathrm{R}=\frac{\mathrm{V}}{\mathrm{I}}\end{array}$

Where$R=$resistance,$V=$voltage, and$I=$ current.

1. Units are$ohms$ for resistance,$volts$ for voltage, and $ampere$for current
2. This formula tells that your resistance is always equal to your voltage divided by the current. You can also say that your voltage equals your current multiplied by your resistance.