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). All materials resist current flow to some degree.

Contents

- 1 What is resistance and example?
- 2 What is resistance and its formula?
- 3 What is a resistance simple definition?
- 4 What is resistance in very short answer?
- 5 What is resistance unit?
- 6 What is current formula?
- 7 What is called resistance?
- 8 What is resistance value?
- 9 What is current and resistance?
- 10 What causes resistance?
- 11 What is meant by 1 ohm?
- 12 How do I calculate resistance?
- 13 How do I measure resistance?

## 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 resistance and its formula?

Resistance Formula The resistance formula is as follows: Resistance = voltage drop across a resistor/ current flowing through a resistor. R = frac{V}{I} R = resistance (Ohms, Ω) V = voltage difference which is between the two ends of a resistor (Volts, V)

## What is a resistance simple definition?

1: an act or instance of opposing. 2: the ability to withstand the force or effect of resistance to disease. 3: an opposing or slowing force The car’s sleek design reduces wind resistance. 4: the opposition offered by a substance to the passage through it of an electric current.

## What is resistance in very short answer?

Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R.

## What is resistance unit?

The unit of the electrical resistance, measured with direct current, is the ohm (abbreviated Ω), named after the German physicist and mathematician Georg Simon Ohm (1789-1854). According to ohm’s law, the resistance R is the ratio of the voltage U across a conductor and the current I flowing through it: R = U / I.

## What is current formula?

The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## What is called 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. Examples: silver, copper, gold and aluminum.

## What is resistance value?

The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its ‘resistance’.

## What is current and resistance?

Current is the rate at which charge is flowing. Resistance is a material’s tendency to resist the flow of charge (current).

## 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 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.

## 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.

## How do I measure resistance?

Resistance can be calculated by measuring the current and voltage using Ohm’s Law. As a result, a circuit’s resistance value can be determined if the current and voltage measured values are known. Analog multimeters and digital multimeters employ the measurement principle of Ohm’s Law to measure resistance.