Resistance definition

A measure of the degree to which a substance impedes the flow of electric current induced by a voltage. Resistance is measured in ohms. Good conductors, such as copper, have low resistance. Good insulators, such as rubber, have high resistance.

How to use resistance in a sentence. The act or an instance of resisting or the capacity to resist. English dictionary definition of resistance. A force that tends to oppose or retard motion.

What does resistance mean? Oxford Dictionaries as The refusal to accept or comply with something. The ability not to be affected by something, especially adversely. In electrical engineering or physics, resistance is the ability of a substance or an electrical circuit to stop the flow of an electrical current through it. The salt reduces the electrical resistance of the water.

It is represented by the uppercase letter R. When an electric current of one ampere passes through a component across which a potential difference ( voltage) of one volt exists, then the resistance of that component is one ohm. As batteries age and fail, their internal resistance will typically increase because the plate surface can sulfate or shed active material, which adversely affects its ability to perform. An example of resistance is a child fighting against her kidnapper.

Etymology: L, resistere, to withstand. They are the most resistant to the hazel blight of anything that I have worked with so far in years. He was a big man with a terrible amount of resistant force, and it took a great deal of alcohol even to move him.

Cross-resistance occurs when resistance to one insecticide confers. The resistance is measured in units of ohms (Ω). You can see a listing of all my videos a. Antimicrobial resistance is the ability of microbes to grow in the presence of a chemical (drug) that would normally kill them or limit their growth.

In the early stages of insulin resistance , the pancreas steps up its production of insulin in order to control the increased levels of glucose in the blood. As a result, it is not unusual for patients to have high blood sugar levels and high blood insulin levels (a condition known as hyperinsulinemia) at the same time. Margery Allingham, chapter 1 in The China Governess‎: When Timothy and Julia hurried up the staircase to the bedroom floor, where a considerable commotion was taking place, Tim took Barry Leach with him. For example, some forms of the staphylococcus bacterium are resistant to treatment with antibiotics.

If you consider electrons flowing through a wire as analogous to marbles rolling down a ramp, resistance is what would happen if obstructions were placed on the ramp, causing the flow of marbles to slow as they transfer some of their energy to the obstructions. Insulin is a hormone produced by the pancreas, which tells the cells (muscle, fat, and liver) of the body to absorb excess glucose circulating in the blood. Glucose is the main source of energy for the human body. Insulin resistance is a condition in which insulin is produce but the cells do not absorb excess glucose,. Sag resistance is defined as the ability of a paint or coating to resist sagging failure, which is a bending or drooping of the wet coating.

Creep resistance is a term used in materials science that refers to a solid material’s ability to resist “creep,” which refers to the tendency of a material to slowly deform over a long period of exposure to high levels of stress.