Practicing Success
Practicing Success
CUET Preparation Today
Read the passage and answer the question. Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F, when kept apart at some distance. A third spherical conductor having same radius as that of 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: |
Following from last question, what is the charge on A? |
3Q/8 3Q/4 3Q/2 Q/2 |
3Q/4 |
Every time two bodi When an identical uncharged spherical conductor A is brought in contact with charged sphere B.
By symmetry, the total charge will be shared equally among them, as both have equal radii.
∴ Charge on A and B =Q/2
Now, when the conductor A is brought in contact with C.
They will also share equal charge among themselves, as both have equal radii.
∴ Charge on A and C =$\frac{Q+\frac{Q}{2}}{2}$=3Q/4
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