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. Examples: silver, copper, gold and aluminum.
What is the true meaning of resistance?
noun. the act or power of resisting, opposing, or withstanding . the opposition offered by one thing, force, etc., to another.
What does resistant mean?
: opposed to something : wanting to prevent something from happening . : not affected or harmed by something. See the full definition for resistant in the English Language Learners Dictionary. resistant.
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 do you mean by resistance class 10?
Resistance: Resistance is a property of conductor due to which it resists the flow of electric current through it . A component that is used to resist the flow of electric current in a circuit is called a resistor. In practical application, resistors are used to increase or decrease the electric current.
What is an example of resistance?
The act or an instance of resisting or the capacity to resist. 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 purpose of resistance?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels , to divide voltages, bias active elements, and terminate transmission lines, among other uses.
What is the best definition of resistance?
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 meant by 1 ohm?
One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.
What is a good resistance reading?
It automatically subtracts test lead resistance—typically 0.2 Ω to 0.5 Ω. Ideally, if test leads touch (are shorted together), the display should show 0 Ω . ... Read the measurement on the display.
What are the causes of 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.
How do I calculate resistance?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I . For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance R T = 9 volts / 3 amps = 3 Ω.
What is resistance in medical term?
Resistance: Opposition to something, or the ability to withstand something . For example, some forms of the staphylococcus bacterium are resistant to treatment with antibiotics.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R . The SI unit of current is Ampere (Amp).
What is resistance and its formula?
V is the potential difference in volts , V. I is the current in amperes (amps), A. R is the resistance in ohms, Ω The equation can be rearranged to find the resistance: R = V ÷ I Question.
What is rheostat class 10th?
Rheostat is an electric device used as a variable resistance , like the regulator of the fan. It is used to change the electric resistance in the electric circuit. UsuallyRheostat consists of a coil of wire with a terminal at one end and a sliding contact that moves along the coil to tap off the current.
