Resistance and Resistivity

Resistance and Resistivity For Live Classes, Concept Videos, Quizzes, Mock Tests & Revision Notes please see our Website/App: Our Website: http://bit.ly/2KBC0l1 Android App: https://bit.ly/3k48zdK CBSE Class 12 Courses: https://bit.ly/4h0L7IN CBSE Class 11 Courses: https://bit.ly/48isN9Q CBSE Class 10 Courses: https://bit.ly/363U55V CBSE Class 9 Courses: https://bit.ly/39Pm7mM CBSE Class 8 Courses: https://bit.ly/3bJByzB ICSE Class 10 Courses: https://bit.ly/2MaXpFo ICSE Class 9 Courses: https://bit.ly/3iFV7dl ICSE Class 8 Courses: https://bit.ly/3boM5OB IGCSE Courses: https://bit.ly/2YNwQcn Artificial Intelligence: https://bit.ly/3vm3FAE Python Coding: https://bit.ly/3nX0s2y Java Coding: https://bit.ly/3chHTAK Facebook page: http://bit.ly/2s6VYhf Resistance is the property of a material that opposes the flow of electric current. It determines how much a material resists the movement of electrons. The unit of resistance is Ohm (Ω). The formula for resistance is: R = V/I where R is resistance in ohms, V is voltage in volts, and I is current in amperes. Resistance also depends on the material's dimensions and resistivity: R = ρ (L/A) where ρ is resistivity, L is the length of the material, and A is the cross-sectional area. Resistivity is a material-specific property that quantifies how strongly a given material opposes the flow of electric current. It is independent of the shape and size of the material. The unit of resistivity is Ohm-meter (Ω·m). The formula for resistivity is: ρ = R (A/L) Materials with low resistivity, like copper and silver, are good conductors of electricity, while materials with high resistivity, like rubber and glass, are good insulators. At Manocha Academy, learning Science and Math is Easy! The school coursework is explained with simple examples that you experience every day! Yes, Science & Math is all around you! Let's learn every day from everyday life!