When a wire is stretched to three times?
Andrew Campbell
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Answer: The resistance of a wire is inversely proportional to its area and directly proportional to its length. When the length is tripled then resistance will also become three times. If The wire is stretched 3 times the original length, the cross-section of the wire is cut to 1/3rd it's the original cross-section.
When a wire is stretched to three times of its length its resistance is?
Assertion : When a wire is stretched to three times its length, its resistance becomes 9 times. Reason: Resistance is directly proportional to length of wire.
What is the new resistance of a wire which is stretched to three times its original length given that the original resistance of the wire was 10 Ω?
so, the new resistance increases nine fold.
What happens to resistance when wire is stretched?
As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant. Hence, we can see that the new resistance is four times the previous resistance.
What happens to resistance when length is increased by 3 times?
When the wire is streched 3 times the length then the length increase and the area of cross section also decrease therefore the resistance increase.
If a wire is stretched to double its length, find the new resistance if the original resistance ...
When length increases what happens to resistance?
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 of a conductor when its length is increased?
the resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa. so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.
What happened to the resistance of the wire when its length is increased to twice its original length?
resistance is directly proportional to length, so resistance will also become twice.
How does resistance of wire change?
- When the length is tripled then its resistance will also becomes three times.
- If the diameter get tripled then its resistance becomes one ninth of the initial reistance.
- If the material is changed to one whose resistivity is three times then again its resistance will be three times.
What is the new resistance of the wire wrt the original wire if it is stretched to twice its original length?
If the original length of the wire is l and its cross-sectional area is A, then its resistance, R=ρl/A. When the length becomes 2l, cross-sectional area reduces to A/2 because volume of the wire does not change. Changes resistance, R′=ρ(2l)(A/2)=4ρlA=4R.
When A wire of resistance R is stretched 3 times of its length the new resistance becomes?
If The wire is stretched 3 times the original length, the cross-section of the wire is cut to 1/3rd it's the original cross-section. Since the resistance of a wire is given by R = rho*l/A the length while cutting the cross-section by 3x, the new resistance will be 9 times the original resistance.
What is the relationship between resistance and resistivity?
Relation between Resistivity and Resistance is: R=ρlA, where ρ is the resistivity, l is the length of the conductor and A is the cross sectional area. We know that the resistivity of a material depends on the temperature.
How will resistivity change for A wire stretched to thrice its length?
Solution. (i) Since resistivity depends on the nature of the material of wire and is independent of dimensions of wire, so the resistivity remains unchanged.
When a wire is stretched to two times of its length the longitudinal strain produced in it is?
Longitudinal Strain is ratio of change in length to original length. Wire is stretched to double it's original length. Hence change in length = 2×L - L (where L is original length. ).
What is the difference between resistance and resistivity?
Resistance is defined as the property of the conductor which opposes the flow of electric current. ... Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. The SI unit of resistivity is Ohm.
What does the resistivity of a wire depends on?
The resistivity is the property of the material which depends on the nature and the composition of the material and the composition is affected by the temperature. And the length and area of the cross-section is affected by the resistance, not the resistivity. Hence, the resistivity depends on the temperature.
How does the resistance of a wire change when 3 A Its length is tripled by its diameter is tripled its material is changed to one whose resistivity is three time?
Resistance becomes 1/9 th. Resistance becomes 3 times.
What would be the effect on the resistance of a metal wire of increasing its length?
(a) The resistance of a metal wire will increase as it is directly proportional to length.
How does the resistance and resistivity change if area is change?
Resistance is proportional to resistivity and length, and inversely proportional to cross sectional area.
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.
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 happens to the resistance of a wire if its length is doubled and area of cross section is also 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=ρ1A∝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 ...
What happens to resistance of the conductor 3 when temperature is increased when area of cross section is increased when length is increased?
So, when area of cross section is increased, Resistance decreases.
Why does wire length increase 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.
What happens when resistance is doubled?
if resistance is doubled then the current would be halved as resistance is inversely proportional to the current flowing in a circuit. that is if the resistance is doubled the current would be halved.
