Two metal spheres are fixed on insulating stands. Sphere X starts off uncharged and sphere Y starts off positively charged. A metal rod, which is held using an insulating handle, is brought into contact with X and Y as shown. What charges do X and Y have after the rod has been placed in contact with them?
- AX positive, Y positive
- BX positive, Y uncharged
- CX uncharged, Y positive
- DX uncharged, Y uncharged