+91-87964 74404
FlagBACK
Question icon
Electrostatics

if the length of the wire is increased by 30% then its resistance wiil be increased by how much?

Profile image of manali
11 Years agoGrade
Answers icon

1 Answer

Profile image of Saurabh Kumar
11 Years ago
Resistance is directly proportional to wire length and inversely proportional to wire cross-sectional.
Volume = Area * length 
V = A L   or A = V/L
since, volume remaoins same.
so R’ = (rho) L2/V
Now differentiate the relation and find the relative change.
 so the change in th3e resistance will be 2 times of the change in the length.

Other Related Questions on electrostatics

question mark
Electrostatics question based on earthing of spherical shell
electrostatics
1 Answer Available

Last Activity: 3 Years ago

question mark
an object has a charge of 2c and gains 10^19 electrons. the net chaarge on the object becomes??
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
A wire with a linear charge density lambda forms a quarter of a cjrclenof radius R and is placed asa shown in thefigure with its centre of curvature at the origin O the electric field at O will be
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Find the value of q so that system remains in equilibrium.. figure attached below
electrostatics
1 Answer Available

Last Activity: 4 Years ago

question mark
Need to find the time taken for the dipole to come back to eqm
 
electrostatics
1 Answer Available

Last Activity: 4 Years ago