What is resistance and example?

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 the resistance in electricity?

Resistance to electricity–that is, electrical resistance–is a force that counteracts the flow of current. In this way, it serves as an indicator of how difficult it is for current to flow. Resistance values are expressed in ohms (Ω).

What is resistance class 9?

Resistance is defined as an opposition to current flow. An electrical circuit must have resistance in it in order to change electrical energy to light, heat or movement. Resistance is an inherent opposition to the flow of electrons present in conductors.

What is resistance in a material?

Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current.

How do you explain resistance to a child?

Resistance – Resistance measures how well a material or object conducts electricity. Low resistance means the object conducts electricity well, high resistance means the object does not conduct electricity well.

What is a resistant person?

Someone who is resistant to something is opposed to it and wants to prevent it. Some people are very resistant to the idea of exercise. Synonyms: opposed, hostile, dissident, unwilling More Synonyms of resistant. adjective.

What causes resistance?

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 resistance in Ohm’s law?

Ohm’s law: an empirical relation stating that the current I is proportional to the potential difference V, ∝ V; it is often written as I = V/R, where R is the resistance resistance: the electric property that impedes current; for ohmic materials, it is the ratio of voltage to current, R = V/I ohm: the unit of …

What is resistance class 7th?

1. Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. When an electric current passes through a high resistance wire, the electric energy gets converted into heat energy. This heat energy heats up the resistance wire.

What is resistance class 11?

The property of a conductor by virtue of which it opposes the flow of electric current through it is called resistance. It is given by the ratio of voltage applied to the electric current which flows through it. R = V/I.

What is resistivity formula?

Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.

What are resistors in simple terms?

: a device that has electrical resistance and that is used in an electric circuit for protection, operation, or current control.