# resistance meaning in physics

Resistance, in electricity, property of an electric circuit or part of a circuit that transforms electric energy into heat energy in opposing electric current. The gradient (slope) of the line shows how big the resistance is. Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance. Resistance is a measure of the opposition to current flow in an electrical circuit. Ohm defines the unit of resistance of "1 Ohm" as the resistance between two points in a conductor where the application of 1 volt will push 1 ampere, or 6.241×10^18 electrons. Wider wires have a greater cross-sectional area. This can be attributed to the lower amount of resistance that is present in the wider pipe. Dynamic load, for e.g. Electrical resistance shares some conceptual parallels with the notion of mechanical friction. Answered by: Martin Archer, Physics Student, Imperial College London, UK Impedance is a more general term for resistance that also includes reactance. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Static load can be resistor, heating coil etc. Low resistance allows more current to flow and vice versa. The circuit with the higher resistance will allow less charge to flow, meaning the circuit with higher resistance has less current flowing through it. If the resistance of a component is constant (constant means it stays the same) then a plot (graph) of current against voltage will be a straight line. Definition of Electrical Resistance Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Second, the cross-sectional area of the wires will affect the amount of resistance. It can be due to static or dynamic load. In electronics and electromagnetism, the electrical resistance of an object is a measure of its opposition to the flow of electric current. When … All materials resist current flow to some degree. is electric motor load. More collisions mean more resistance. This brings us back to Georg Ohm. voltage = current x resistance V = I x R. is an expression of ohm's law. It is nothing but opposition to the current flow. Water will flow through a wider pipe at a higher rate than it will flow through a narrow pipe. In other words, resistance is the opposition to a steady electric current. He is credited for formulating Ohm's Law. The reciprocal quantity is electrical conductance, and is the ease with which an electric current passes. Resistance involves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductors. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). A test circuit is used to find how the current through a