What Is Electrical Resistance For Kids

We measure that resistance in order to determine the effect that it will have on current.

What is electrical resistance for kids. Learn facts about electrical resistance for kids. Ohm s law said that the voltage between any two points in a conductor changes directly as the current between the two. The voltage red and current blue versus time horizontal axis for a capacitor top and inductor bottom. Since the amplitude of the current and voltage sinusoids are the same the absolute value of impedance is 1 for both the capacitor and the inductor in whatever units the graph is using.

The resistance of the most widely used conducting materials metals alters with changes in their temperature. Ohms are named after georg simon ohm 1784 1854 a german physicist who studied the relationship between voltage current and resistance. The scientific model of electrical resistance is of the moving charged particles colliding with the particles which comprise the structure of the material through which the current is passing. Resistance is measured in ohms symbolized by the greek letter omega ω.

The electrical resistance of different materials can vary enormously. It can also be used to figure out the resistance of a circuit if the voltage is also known or the voltage of a circuit if the resistance is known. Resistance discovered by georg simon ohm in 1827 is the ratio between voltage and current. Electrical resistance is the repulsion of a current within a circuit it explains the relationship between voltage amount of electrical pressure and the current flow of electricity.

Scientists measure resistance in ohms rhymes with homes. Resistance is a measure of the opposition to current flow in an electrical circuit. The electrical conductivity of a material is the measurement of the ability of the material to allow for the flow of electrical current. There is a magical little formula used to figure out the resistance in an electrical system.