Physics
>
A-Level
>
Electricity
>
How does t...
3 years ago
·
23 Replies
·
43798 views
Trudie Swift
23 Answers
Enthusiastic physics and maths tutor with 31 years experience
89 reviews
Resistance is proportional to the length.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.The longer the length of wire, the greater the resistance. This is because there will be more collisions with the metal ions by the flowing electrons. This can be demonstrated in the equation resistance = resistivity x length / area. Resistance is directly proportional to length.
The resistance is directly proportional to the length of the wire, the longer the wire the greater the resistance.
I look forward to helping you learn and develop
2 reviews
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. Also there is a formula which relates resisitance to length - other factors being kept constant - and the relationship can be seen through this formula as well.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.The length of a wire is directly proportional to the wires resistance. This is because the current, which is a flow of electrons, will collide more frequently with the positive charged metal ions, as there will be a higher number of them in a larger cross sectional area
Do you find Physics hard? So did I. I can help you learn Physics.
You can think of a long wire as several resistors in series together. In a series circuit, to find the total resistance you add the resistance of each resistor together. The more resistors you have the greater the total resistance. Likewise the longer the wire the greater the resistance. In a parallel circuit, the more resistors you have in parallel the more the resistance decreases, because it increases the number of pathways for the electricity to flow. This would be similar to increasing the diameter of a single piece of wire. The greater the diameter the lower the resistance.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Get ready to achieve your goals!
Provided the cross-section area of the wire is the same the resistance of the wire will increase with length. The longer the wire the higher will be the resistance.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.I am a very committed science tutor with excellent tutoring skills
3 reviews
With an increase in the length of wire, the flow of the electrons will have a much longer distance to travel. As these electrons flow they collide with the atoms inside the wire, this decrease the overall drift velocity of the electrons which increases the resistance of wire. By extension, length of a wire is directly proportional to the resistance of a wire.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Physics tutor and Examiner to GCSE and A Level for over 40 years
3 reviews
As the length of the wire increases the resistance of the wire also increases. Assuming the temperature of the wire is constant as this will affect its resistance
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Experienced Science teacher and examiner with a passion for Science
5 reviews
Assuming the wire is uniform in length, it will be directly proportional to its length. The temperature must also be constant as this will affect it.
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Resistance of metal wire is directly proportional to length
< of short wire
By increasing the length of wire the resistance goes on increasing.Its according to the formula: R=p L/A
Where p(rao)= resistivity constant
L= length of wire
A=area of wire
As R is directly proportional to L so it will increase.
Real life example: you are going through a tunnel having barriers.The more the length the more difficulty level to pass from.
The resistance of a wire is directly proportional to the length of the wire. Think of it as a channel through which the current has to pass. The longer the channel the higher the obstruction to get through the channel.
The longer a wire, the greater its resistance. This varies linearly, doubling the length doubles the resistance. Likewise, halving the length halves the resistance.
Think you can help?
Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.
Find an A-Level Physics Tutor