The diagrams illustrate a horizontal wire placed in a magnetic field. The horizontal wire is securely fixed at both ends (not shown), so it cannot move. The magnets and the holder rest on a balance. When no current flows in the wire, the balance reading is $0.35\text{ g}$. A d.c. current passes through the wire, as shown. What happens to the reading on the balance?
- Asmaller than $0.35\text{ g}$
- Bno change
- Cchanging from smaller to larger than $0.35\text{ g}$ repeatedly
- Dlarger than $0.35\text{ g}$