CBSE Class 10 Answered
can you give a detailed explanation on formulae
r=p l/a
i need the answer quickly before 02:00
Asked by Anirudh | 04 Feb, 2018, 11:11: AM
Expert Answer
- It means that resistance is directly proportional to the length of the conducting wire, that means, longer the wire, higher will be the resistance against the flow of current through that wire.
- Second major point is, the resistance is inversely proprotional to the cross sectional area of the wire, that is if the cross sectional area or the thickness of wire is more, the resistance against the flow of current in that wire will be comparitively less.
- On converting the proportionality sign into equallity (=), we get a coeficient of proportionality that is 'rho' (p) which is called resistivity and that is the material property of the wire (a constant number for every element)
Hope this helped!
Answered by Abhijeet Mishra | 04 Feb, 2018, 01:25: PM
Application Videos
-
Some other formulae for calculating power ...
This video shows explains the application of formula for calculating the po... -
Cost of electricity
This video describes the calculation of cost of electricity for electrical ... -
Combination of resistors -parallel
This video describes the calculation of effective resistance, total current... -
Combination of resistors -series
This video describes the calculation of electric current flowing through th... -
Current flowing in series combination
This video explains the assertion reason question based on the concept o...
Concept Videos
-
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Electricity
Explain a series and a parallel combination of resistors in a circuit. Det... -
Resistances in series or parallel
This video describes the way to calculate the equivalent resistance for va... -
Resistances in series or parallel
This video describes the way to calculate the equivalent resistance for va...
CBSE 10 - Physics
Asked by kamalaranjanmohantymohanty5 | 06 Jan, 2024, 10:05: AM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by nandhikasugumar | 05 Oct, 2023, 04:01: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by daniya062008 | 02 Oct, 2023, 08:25: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:28: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:21: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 03 Sep, 2023, 12:11: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by prassanna.j | 28 Aug, 2023, 09:49: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by praveenkumae975 | 06 Feb, 2023, 07:19: PM
ANSWERED BY EXPERTCBSE 10 - Physics
Asked by ruparus | 04 Nov, 2022, 09:52: PM
ANSWERED BY EXPERT
