Quick Answer: What Is The Definition Resistance?

What does resistance mean?

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.

Resistance causes electrical energy to be dissipated as heat..

How can we find resistance?

Ohms Law and PowerTo find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)

What is meant by air resistance?

Air resistance is a type of friction between air and another material. For example, when an aeroplane flies through the air, air particles hit the aeroplane making it more difficult for it to move through the air. It’s the same for an object moving through water.

What is the law of resistance?

1st law of resistance The resistance of conductor is directly proportional to the length of the conductor. Greater is the length of conductor greater will be the resistance, similarly smaller is the length, and smaller will be the resistance of the conductor.

What is the difference between resistance and resistant?

As nouns the difference between resistance and resistant is that resistance is the act of resisting, or the capacity to resist while resistant is a person who resists; especially a member of a resistance movement.

What are examples of antibiotic resistance?

Examples of bacteria that are resistant to antibiotics include methicillin-resistant Staphylococcus aureus (MRSA), penicillin-resistant Enterococcus, and multidrug-resistant Mycobacterium tuberculosis (MDR-TB), which is resistant to two tuberculosis drugs, isoniazid and rifampicin.

What is an easy definition for 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 an example of resistance?

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 resistance and its types?

Most types of resistor are linear devices that produce a voltage drop across themselves when an electrical current flows through them because they obey Ohm’s Law, and different values of resistance produces different values of current or voltage. …

What is the working 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 causes 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.