Home
Class 12
PHYSICS
Two insulated identically sized charged ...

Two insulated identically sized charged copper spheres A and B have their centers separated by a distance of 50 cm. Charges on each sphere is
`q=6.5xx10^(-7)C`
. A third sphere of the same size but uncharged is brought in contact with the first, then in contact with the second and finally removed from both. What is the new force of repulsion between A and B?

Text Solution

Verified by Experts

Here, Charge on `A = 6.5xx10^(-7) C` , charge on `B = 6.5xx10^(-7) C`
Their sizes are equal . When third sphere C of same size is brought in contact with B carrying `6.5xx10^(-7)` coulomb charge. As their sizes are equal, therefore , charge on each of the spheres B and C becomes
`q_(2) = ((6.5+3.25) xx10^(-7))/(2) C = 4.875xx10^(-7) C`
As `F = (1)/(4pi in_(0)) (q_(1) q_(2))/(r^(2)) , r = 0.5m :. F = (9xx10^(9)xx3.25xx10^(-7)xx4.875xx10^(-7))/((0.5)^(2)) = 5.7xx10^(-3) N`
Promotional Banner

Similar Questions

Explore conceptually related problems

Two insulated identically sized charged copper spheres A and B have their centers separated by a distance of 50 cm. A third sphere of the same size but uncharged is brought in contact with the first, then in contact with the second and finally removed from both. What is the new force of repulsion between A and B?

Two spherical conductors B and C having equal radii and cayying equal charges on them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that B but uncharged is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is

(a) Two insulated charged copper spheres A and B have their centers speparated by a distance of 50 cm. What is the mutal force of electrostatic repulsion if the charge on each is 6.5xx10^(-7) C ? The radill of A and B are negalible compared to the distance of separation. (b) What is the force of repulsion if each sphere is charged double the above amount, and the distance between them is halved ?