CBSE Class 12-science Answered
Sir Pl answer fast
Asked by jain.pradeep | 29 Feb, 2020, 10:46: AM
Expert Answer
If current flowing through two sets is same, then their resistances are equal.
Resistance of set-1 wire, R1 = ρ1 l / A1
Resistance of set-2 wire, R2 = ρ2 l / A2
Where ρ is respective resistivity of material of wire of each set,
l is the equal length of wire and A is respective area of cross section.
Since R1 = R2 , we have, ρ1 l / A1 = ρ2 l / A2
Hence, we get , ( ρ1 / ρ2 ) = ( A1 / A2 ) ........................ (1)
-----------------------------------------------------
if the balancing length lb is less than l/2, obviously for both set, balancing length is equal.
If balancing length is greater than l/2, let us assmy , lb = ( l/2 ) + x
the excess resistance Rx in set-1 = ρ1 x / A1 ...................(2)
using eqn.(1), we have, ( ρ1 / A1 ) = ( ρ2 / A2 )
hence eqn.(2) bexomes, Rx = ρ2 x / A2 , which is same as excess resistance in set-2.
Hence balancing legths will be equal for both the set
Answered by Thiyagarajan K | 01 Mar, 2020, 08:56: AM
Concept Videos
-
Electric Charge - Part 1
This video describes the concept of charge, conductors and insulators, and ... -
Gold Leaf Electroscope - Part 1
This video explains the basic properties of electric charges. -
Coulom's Law of Electric Force - Part 1 ...
This video describes Coulomb's law to calculate the force between any two p... -
All about electric fields
Define electric field in terms of Coulomb's force. Apply superposition prin... -
Electric Field Lines
This video explains the representation of electric field due to a single ch...
CBSE 12-science - Physics
Asked by artabandhusahu85 | 24 Apr, 2024, 12:07: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by niharvijayvargiya5 | 23 Apr, 2024, 06:40: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by kulhariabhijeet | 21 Apr, 2024, 02:39: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by mohapatraswetalina88 | 21 Apr, 2024, 12:18: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by aishaisha091098 | 19 Apr, 2024, 04:54: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by dasrituparna1999 | 13 Apr, 2024, 06:56: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by dasrituparna1999 | 12 Apr, 2024, 09:26: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by mishrigupta19319 | 08 Apr, 2024, 06:28: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by madhav9119887644 | 07 Apr, 2024, 08:10: PM
ANSWERED BY EXPERT
