resistance of a conductor depends on

NCERT Question 18 (d) -

On what factors does the resistance of a conductor depend?

Last updated at April 28, 2020 by Teachoo, Resistance of a conductor is directly proportional to its length, if we increase the length of a wire (conductor),its resistance increases(and hence less current can pass through it), If we reduce length,resistance decreases (and hence more current can pass through it), If we cut a wire and see through it horizontally,it is in form of a circle, This Area of Circle is called Area of Cross Section of the Wire. The resistance R and conductance G of a conductor of uniform cross section, therefore, can be computed as The more the conductive, the less resistance it will have. Another way to prevent getting this page in the future is to use Privacy Pass.

If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Nature of … If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. 2, Area of Cross Section of Wire= 154 m • To calculate the resistance, consider a section of conducting wire with cross-sectional area A, length L, and resistivity ρ. Why? Learn Science with Notes and NCERT Solutions, Factors on which Resistance of Conductor Depends, Resistance in Series and Parallel - Full Comparison, Applications of Heating Effect of Electric Current. Teachoo is free.

Area of Cross Section of Wire= 22/7×7 • • The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. You may need to download version 2.0 now from the Chrome Web Store. For a given material, the resistance is inversely proportional to the cross-sectional area; for example, a thick copper wire has lower resistance than an otherwise-identical thin copper wire. Answer. What change will occur in the current through it? Terms of Service. Question - R = ρAl. Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. Resistivity is defined as the measure of the resisting power of a specified material to the flow of an electric current. Resistance depends on the resistivity. Your IP: 104.194.11.209

Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.

Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? 2, If we double Area of Cross Section (by increasing thickness of wire). . The resistance of a given object depends primarily on two factors: What material it is made of, and its shape. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Resistance of a conductor is directly proportional to its length R ∝ l if we increase the length of a wire (conductor),its resistance increases(and hence less current can pass through it) If we reduce length,resistance decreases (and hence more current can pass through it)

Teachoo provides the best content available! Performance & security by Cloudflare, Please complete the security check to access. Q1 Page 209 - But if we reduce area of cross section(example we take thin fire), Resistance increases and hence less electricity can pass through it, Note - We will study more about The resistance of the conductor depends on the following factors: The temperature of the conductor; The cross-sectional area of the conductor; Length of the conductor; Nature of the material of the conductor Resistance of a conductor is inversely proportional to its area of cross- section. Cloudflare Ray ID: 5eaa538f7a08dc95 The resistivity is a characteristic of the material used to fabricate a wire or other electrical component, whereas the resistance is a characteristic of the wire or component. resistivity in the next post A cylindrical conductor of length l and uniform area of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section, Subscribe to our Youtube Channel - https://you.tube/teachoo. . Your IP: 139.59.20.20 The resistance of the conductor depends on the following factors: The temperature of the conductor. • Also, for a given material, the resistance is proportional to the length; for example, a long copper wire has higher resistance than an otherwise-identical short copper wire. Resistance = Potential difference/ Current. Q3 Page 209 - (a) The resistance of a conductor depends on thickness (cross sectional area of the wire), length and temperature. This is the reason that we use thick wire to carry more electrical load (as thick wire has more area of cross section and offers less resistance and more electricity can pass through it ), Resistance also depends on the nature of the material, Conductors offer less resistance(Example- copper), Insulators offer more resistance (Example- Plastic). How does the resistance of a wire vary with its area of cross-section?

If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Performance & security by Cloudflare, Please complete the security check to access. Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Maths and Science at Teachoo. But in case of alloys (like nichrome), Temperature has no effect on the resistance. Resistance gets halved and hence more electricity can pass through it.

Length of the conductor.

Cloudflare Ray ID: 5eaa53945aa9ff7c The cross-sectional area of the conductor. He has been teaching from the past 9 years. Login to view more pages. On signing up you are confirming that you have read and agree to Q2 Page 209 -

In case of Pure Metals, Resistance increases on Increasing Temperature and Decreases on Decreasing Temperature.

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