What is the best definition of electrical resistance?
Electrical-resistance meaning (physics) The opposition offered by an electrical conductor to the flow of a current through itself, resulting in a conversion of electrical energy into heat and radiation. The SI derived unit of resistance is the ohm. Symbol: R. noun.
What is electrical resistance easy definition?
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Conductors: Materials that offer very little resistance where electrons can move easily.
What is the meaning of resistance in history?
resistance, also called Underground, in European history, any of various secret and clandestine groups that sprang up throughout German-occupied Europe during World War II to oppose Nazi rule.
What is the correct definition for resistance?
1 : an act or instance of opposing. 2 : the ability to withstand the force or effect of resistance to disease. 3 : an opposing or slowing force The car’s sleek design reduces wind resistance. 4 : the opposition offered by a substance to the passage through it of an electric current.
How do you describe electrical resistance?
Electrical Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. The resistance is measured in units of ohms (Ω). If we make an analogy to water flow in pipes, the resistance is bigger when the pipe is thinner, so the water flow is decreased.
What causes electrical resistance?
An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
What is electrical resistance of an object?
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction.
Who founded electrical resistance?
That the resistance, or the ratio of voltage to current, for all or part of an electric circuit at a fixed temperature is generally constant had been established by 1827 as a result of the investigations of the German physicist Georg Simon Ohm.
What is resistance and example?
Resistance is defined as a refusal to give in or to something that slows down or prevents something. An example of resistance is a child fighting against her kidnapper. An example of resistance is wind against the wings of a plane.
What is electrical resistance and its unit?
SI unit of resistance is Ohm (Ω). It is resistance offered by an object when 1 volt potential difference is applied across it and 1 Ampere of current passes through it.
What does high electrical resistance mean?
opposition to current flow
High electrical resistance is the opposition to current flow within a circuit. A high electrical resistance of an electrical conductor is the opposition to the flow of an electric current through that conductor; the inverse measure is known as electrical conductance.
Which is the best definition of electrical resistance?
Electrical resistance is defined as the property of an electrical component to resist the flow of electric current. The unit of electrical resistance is ohm which is defined as volt per ampere.
What was the role of Culture in resistance?
Cultural resistance played a critical role in both the defeat of the Portuguese and in the establishment of the liberated zones. For Cabral, and also for Fanon, culture is not some aesthetic artefact, but an expression of history, the foundation of liberation, and a means to resist domination. At heart, culture is subversive.
How to find the value of electric resistance?
If a resistance connected across a 6V battery allows a current of 0.2 ampere through it, find the value of resistance. According to ohm’s law, R= V / I = 6/0.2 = 30 ohms. Resistance connected in series. In a series circuit current through all the elements is equal. Let V 1, V 2, V 3, … V n is the voltage across each resistance.
What does it mean when a conductor has a high resistance?
When an electric current flows through a bulb or any conductor, the conductor offers some obstruction to the current and this obstruction is known as electrical resistance and is denoted by R. For an electrical resistance to be high, the length of the conductor should be high.
