1800-150-456-789
FlagBACK
Flag Electrostatics> Two point charges fixed at some distance ...
question mark

Two point charges fixed at some distance having ratio of magnitude k>1 and force between them is f1 if total charge is divided between them the orce becomes f2. If f1:f2=21:4 find k ?

Oisik Das , 8 Years ago
Grade 12
anser 1 Answers
Vikas TU

Last Activity: 8 Years ago

let q1 and q2 be the charges and the ratio is k.
Therfore,
q1/q2 = k 
or
q1 = k*q2
f1 = kq1q2/r^2
and
f2 = k((q1+q2)/2)^2/r^2
f1/f2 = 21/4 = 4*q1*q2/(q1 +q2)^2
substutute q1= kq2 we get,
k = 21*25/64 => 8.203
 

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on electrostatics

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

Last Activity: 2 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: 2 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
0 Answer Available

Last Activity: 2 Years ago

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

Last Activity: 3 Years ago

question mark
Find the value of q so that system remains in equilibrium
electrostatics
0 Answer Available

Last Activity: 3 Years ago