help@askiitians.com

+91-87964 74404

Grade 12th passElectrostatics

two spherical conductors B &C having equal radii and carrying equal charges with them repel eachother with a force F when kept at a small distance apart . a third spherical conductor A having same charge as that of B but uncharged is brought in contact with B and then with C and finally removed away from both . what is the new force of repulsion between B & C ?

maitreyee jagannath

11 Years agoGrade 12th pass

1 Answer

Shivam Chopra

11 Years ago

Let charge on B & C = q.

So, F = force b/w both conductors = K * q * q / r². where, K = 1/(4πϵ)

Also, charge on A = 0.

So, when A is touched with b , charge gets distributed equally on both conductors So, new charge on both = (q + 0)/2 = q/2.

Both A & B have q/2 charge.

Now, A & C are touched together.

So, new charge on both = (q/2 + q)/2 = 3q/4.

So, now charge on B = q/2, charge on C = 3q/4.

Force = ( K * q/2 * 3q/4 ) / r² = ( K * 3q² ) / 8r²= 3F/8

Please approve it if you like

Electrostatics question based on earthing of spherical shell

electrostatics

1 Answer Available

Last Activity: 3 Years ago

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

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

Find the value of q so that system remains in equilibrium.. figure attached below

electrostatics

1 Answer Available

Last Activity: 4 Years ago

Need to find the time taken for the dipole to come back to eqm

electrostatics

1 Answer Available

Last Activity: 4 Years ago

View all Questions