Question

When an iron plate is put across the $N$ and $S$ poles of a horseshoe magnet ___________.

• A. It short circuits the effect of magnetism
• B. It increases the effect of magnetism
• C. Magnet regains its full strength once the plate is removed
• D. Both $\left(A\right)$ and $\left(C\right)$

Answer 1

The correct option is D Both $\left(A\right)$ and $\left(C\right)$

For the proper storage of horse shoe magnet a piece of iron (keeper) is placed across the poles of it. The iron pate short circuits the effect of magnetism and thereby conserves the magnetic property. Once the iron is removed magnet regains its full strength.