Resistance Examples Physics

Ohm s law resistance and resistors resistance is the difficulty applied by the conductor to the current flowing through it.

Resistance examples physics. Example 1 find the current i through a resistor of resistance r 2 ω if the voltage across the resistor is 6 v. Resistance is a numerical quantity that can be measured and expressed mathematically. Voltage can be thought of as the pressure pushing charges along a conductor while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along. Resistance is represented with the following picture in circuits.

Resistance is low in substances such as metals that are good conductors and high in materials such as plastic and rubber that are insulators. 6 2 i solve for i i 6 2 3 a example 2 in the circuit below resistors r1 and r2 are in series and have resistances of 5 ω and 10 ω respectively. Using the flow analogy electrical resistance is similar to friction. The standard metric unit for resistance is the ohm represented by the greek letter omega.

Mathematical nature of resistance. Resistances in series parallel grade 10 and how to find total resistance of 12 identic resistors that forming a cube. Problem 1 given three resistors shown below find the total resistance of a b. Solution to example 1 substitute r by 2 and v by 6 in ohm s law v r i.

We show resistance with r and unit of it is ohm ω. An electrical device having a resistance of 5 ohms would be represented as r 5. 1 ω resistance of the conductor when 1 a current flows under the 1 v potential difference.