Question: How Do You Describe Resistance?

How do I calculate resistance?

Rearrange V = IR to solve for resistance: R = V / I (resistance = voltage / current).

Plug the values you found into this formula to solve for total resistance.

For example, a series circuit is powered by a 12 volt battery, and the current is measured at 8 amps..

What’s another word for air resistance?

Synonyms for air resistance in English air resistance; drag.

What happens if resistance is too high?

A high resistance in the circuit means a very low current flowing in it when the voltage of the source is constant. … Low resistance in the circuit means a higher current is flowing in the circuit. It depletes the battery at a faster rate which means the battery can not last for a long time.

What is resistance and example?

Licensed from iStockPhoto. noun. 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 are the characteristics of resistance?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. See resistivity.

How do you use resistance in a sentence?

Examples of resistance in a Sentence Noun They have shown a stubborn resistance to change. The troops met heavy resistance as they approached the city. The paint shows good weather resistance. Over time the patient could develop a resistance to the drug.

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.

Why do wires have resistance?

The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.

How does resistance depend on length and area?

Resistance depends on an object’s size, shape, and material. In Figure 3 below, the cylinder’s resistance is directly proportional to its length l. The longer the cylinder, the higher the resistance. Additionally, the resistance is inversely proportional to the cross sectional area A.

What is resistance voltage and current?

Voltage is the difference in charge between two points. Current is the rate at which charge is flowing. Resistance is a material’s tendency to resist the flow of charge (current).

Why is resistance directly proportional to length?

Directly proportional ; as the length of the wire increases , its resistance increases. Why? Simply speaking,the longer the distance the electron has to travel ,the more collisions it will face with the atoms ; which means higher resistance.

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 resistance and its unit?

Siemens per meterElectrical conductivityOhm meterElectrical resistivityElectrical resistance and conductance/SI units

How do I measure resistance?

Resistance is measured in ohms; 1 ohm is equal to 1 volt of electrical difference per 1 ampere of current (1 volt/1 amp). You’ll find your volt of electrical difference by taking several readings using your equipment. Resistance can be measured with an analog or digital multimeter or ohmmeter.

What is the difference between resistance and resistivity Class 10?

One of the major difference between the resistance and the resistivity of the material is that the resistance opposes the flow of free electrons whereas the resistivity is the property of the material which defines the resistance of the material having specific dimension.

Why do we use resistance?

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.