When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times .
What happens when you stretch a wire?
When a wire is stretched, the internal reactive force kicks in and fights the stretch . As a result, work is being done to overcome this opposing force. The wire stores this work in the form of elastic potential energy. ... Stretching of wire is possible only due to the ductility property.
Does stretching of wire decrease resistance?
As a wire gets longer its resistance increases, and as it gets thinner its resistance also increases because its cross sectional area decreases. Doubling the length will double the resistance, but the wire also must get thinner as it is stretched, because it will contain the same amount of metal in twice the length.
Does stretching increase resistance?
The study found that a regular stretching program may actually enhance performance , making people stronger and increasing their endurance.
Why does stretching a wire increase resistance?
Resistance of a wire is directly proportional to length and inversely proportional to cross sectional area . So whenever a wire is stretched its length increases and cross sectional area decrease . According to above proportionally the resistance of wire will increase .
What happens to the resistivity of a wire if it is stretched * A it will increase B it will decrease C first increases then decreases D remains the same?
The Resistivity of the wire will not change with the change in length . Resistivity is a property of the wire, it doesn't depend upon it's length or cross-sectional area.
Why do shorter wires offer the least resistance?
The relationship between resistance and wire length is proportional . The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current .
What happens to the resistance and resistivity of a wire in the following cases a wire is cut into two equal halves B wire is stretched to double its length?
The resistance of the wire is equal to the product of resistivity of the material and length of the wire divided by the area of cross section . The volume of both wire is same. Hence, The new resistivity of the material of the wire is .
What happens to the resistivity of the material if the conductor is stretched to double its length?
Higher the resistivity, lesser will be its conducting nature. Resistivity does not depend on the length of the conductor. Hence, doubling the length will not change its resistivity .
Can you stretch electrical wire?
Such incidences may become a lot less common, however, as scientists from North Carolina State University have created conductive wires that stay intact even when stretched up to eight times their regular length. ...
What happens to resistance when length increases?
From the equation, we understand that resistance is directly proportional to the length of the conductor and inversely proportional to the crossectional area of the conductor. Doubling the length doubles the resistance .
What happens to resistance if area is doubled?
Initial length of the conductor l1=l Final length of the conductor l2=2l Initial cross-sectional area A1=A Final cross-sectional area A2=2A The resistance of conductors given by R=ρ1 A∝1A As both the length and area are doubled Hence, there will be no change in the resistance of the conductor and so it will remain ...
Does resistance improve flexibility?
Contrary to common gym lore, resistance training does not reduce flexibility . When an exercise is performed properly, through a full range of motion, it will actually help increase your flexibility.
What is the difference between resistance and resistivity?
Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons . Resistivity is the physical property of a particular substance which is having particular dimensions.
What happens to the resistance of a copper wire when it is heated?
As the wire gets hotter, the ions vibrate more vigorously. This makes it more difficult for electrons to pass along the wire. Hence the resistance increases .
What is the resistance of a connecting wire?
The resistance of a connecting wire is defined as the ratio of potential difference across its ends to the electric current flowing through it .
How does length of wire affect resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be . ... In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.
What happens to the resistance of a wire of resistance 4ω if it is stretched so that its length becomes double to the original length?
Solution: The resistance of the wire is “directly proportional to” the square in length of wire. So, if the length is stretched to twice then the resistance gets multiplied by four times.
How does resistance change if the length of the wire is increased?
The resistance is directly proportional to the length of the wire , the longer the wire the greater the resistance. Well the longer the wire the more collisions the electrons will have with the atoms in the way from one end of the wire to the other. Therefore the resistance will increase as the length increases.
Why are wider and shorter wires favorable over narrow long ones?
A wide wire has less resistance than a narrow wire of the same material . Electricity flowing through a wire is like water flowing through a hose. More water can flow through a wide hose than a narrow hose. In a similar way, more current can flow through a wide wire than a narrow wire.
When a wire of resistance 10 Ohm is stretched double to its length then its resistivity becomes?
So assuming it were possible to stretch a wire to double it's length without crystallizing the metal to drastically alter its resistance or resistivity the resulting wire would be half as thick .
What will be the resistivity of a wire if it is stretched to double of its original length without loss of mass?
If a wire is stretched to double its original length without loss of mass,how will resistivity of the wire be influenced? The resistivity of the wire will not be affected as it is a property of the material and does not depend up on the shape or external dimensions of the material.
What happens to the resistance and resistivity of a metallic conductor when temperature is increased?
Answer: The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increases as the temperature increases. ... If we raise the temperature of the metallic conductor, the resistance will increase.
When a wire is stretched and its radius becomes R by 2 then its resistance will be?
Explanation: Initial radius of wire, r 1 = r and final radius of wire, r 2 = r/2 = 0.5r .
Can stretch into wires science?
Researchers from North Carolina State University have created conductive wires that can be stretched up to eight times their original length while still functioning . ... Michael Dickey, an assistant professor of chemical and biomolecular engineering at NC State and co-author of a paper on the research.
What term is given to wires that have low resistance?
Materials that require very little energy to enable a current to flow are called conductors ; these have very low electrical resistance. Materials that require a great deal of energy to enable current flow are called insulators; these have very high electrical resistance.
What is the difference between stretching and strengthening?
Strengthening: repeated muscle contractions until the muscle becomes tired . Stretching or Flexibility: slow, sustained lengthening of the muscle.
How Does stretching Prevent injuries?
Injured muscles may not be strong enough to support the joints, which can lead to joint injury. Regular stretching keeps muscles long, lean, and flexible , and this means that exertion “won't put too much force on the muscle itself,” says Nolan. Healthy muscles also help a person with balance problems to avoid falls.
How is the resistance of a wire affected if its length is doubled and its radius is doubled?
(b) The resistance of a wire is inversely proportional to the area of cross-section the wire. Thus, if the radius is doubled, the area increases four times and hence the resistance becomes one-fourth .
Is it OK to tape wires together?
As an electrical accessory, it is not designed to connect electrical wires but to INSULATE them after they have been properly and safely connected as need be. The safest use of electrical tape is to cover minor cracks, cuts, and abrasions on electrical wires where the core insulation is still intact.
Is strengthening better than stretching?
Strength training is superior to static stretching for injury prevention, rehabilitation and sporting performance. Stretching can improve flexibility which may be important for your chosen sport or activity.
What happens to the resistance of a wire if the diameter is doubled?
The resistance of the wire becomes one-fourth , when the diameter of the wire is doubled.
What happens to the resistance if diameter of wire becomes half?
MCQ : If the diameter of a resistance wire is halved then its resistance becomes. The area of the cross-section will get reduced by four times . Thus, the resistance will increase by four times.
Is there any difference between resistance of wire and resistivity of wire?
The basic difference between resistance and resistivity is that resistance is the opposition to the flow of current in the conductor while resistivity is the resistance of the meter cube of a wire or conductor. The SI unit of resistance is ohm while the SI unit of resistivity is ( ohmmeter ).
What is the difference between resistance and resistivity of a wire?
Furthermore, an important difference between resistance and resistivity has to do with the flow of free electrons . Also, resistance is an aspect that opposes the flowing of free electrons. In contrast, resistivity is any material's property that tells the resistance of the material with a particular dimension.
How does resistance affect resistivity?
The longer the length, the smaller the resistance. The greater the resistivity , the higher the resistance.
