What is a resistance in simple words?
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 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 a resistance in science?
Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R.
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.
How do you explain resistance to a child?
Resistance – Resistance measures how well a material or object conducts electricity. Low resistance means the object conducts electricity well, high resistance means the object does not conduct electricity well.
What are types of resistance?
Different Types of Resistors – Fixed, Variable, Linear and Non-Linear Resistors & Applications
- Carbon Composition Resistors.
- Wire wound Resistors.
- Thin Film Resistors.
- Carbon Film Resistors.
- Metal Film Resistors.
- Thick Film Resistors.
- Metal Oxide Resistors.
- Cermet Oxide Resistors (Network Resistors)
What does resistance mean in metals?
The movement of electrons is hindered by vibration of the atoms in the metal lattice, which causes part of the electrical energy of the electric current to be lost – this is resistance.
What is the function of resistance?
A resistor has the ability to reduce voltage and current when used in a circuit. The main function of a resistor is to limit current flow. Ohm’s law tells us that an increase in a resistors value will see a decrease in current.
What can affect resistance?
There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.
What is resistance in real life?
Resistors are called passive electrical elements as they themselves do not release any energy, instead, they absorb the energy and release it in the form of heat, when the electric current is flowing through them. Resistors can be connected in the electrical circuits in two ways, i.e., either in series or in parallel.
What is resistance in a person?
Someone who is resistant to something is opposed to it and wants to prevent it. Some people are very resistant to the idea of exercise. Synonyms: opposed, hostile, dissident, unwilling More Synonyms of resistant. adjective.
Why resistance is used?
Resistance in any electric wire helps in manipulating the current that is flowing through the circuit. Also, it enables the measurement of current and voltage flowing through a circuit.
What are the forms of resistance?
There are three types of resistance, Logical/Rational, Psychological/Emotional, and Sociological.
How is resistance affected?
Resistance is the property of the material that restricts the flow of electrons. There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material.
Why do materials have different resistance?
The resistance of a given wire depends upon its cross-sectional area and its length. One wire that has twice the diameter of another wire has four times the cross-sectional area of the smaller wire. It is four times easier for the electrons to travel through a wire that has twice the diameter of another wire.
What is the importance of resistor?
Resistors ensure components receive the proper voltage by creating a voltage drop, and they can protect a component from voltage spikes. Each component in an electrical circuit, like a light or a switch, requires a specific voltage.
What is resistance and types of resistance?
Resistance is a measure of the opposition to current flow in an electrical circuit also known as ohmic resistance or electrical resistance. Ohms are measured as resistance, symbolised by the Greek letter omega (Ω). The ratio of the applied voltage to the current through the material is then known as resistance.
What is the best way to explain resistance?
An easier way to explain resistance is to consider an example of a person in a crowded market struggling to go from one shop to another. This situation is certainly similar to an electron trying to make its way through a wire.
What is the unit of resistance?
Furthermore, the unit of resistance is ohms which is represented by the Greek uppercase letter omega Ω. Moreover, the resistance depends on the voltage across a particular resistor and the current flowing through it. Resistance refers to a measure of the opposition to current flow in a particular electrical circuit.
What is the resistance of a resistor?
Also, resistors refer to the components of the electric circuits. All the materials certainly resist current flow to a certain degree. The resistance formula is as follows: Resistance = voltage drop across a resistor/ current flowing through a resistor
What is the difference between resistance and conductance?
The electrical resistance of an object refers to the measure of its opposition to the flow of electric current. The inverse quantity refers to the electrical conductance. Electrical conductance refers to the ease with which the passing of an electrical current passing takes place.