Question

Magnetic field in the center of a square wire loop

Answer 1

Explanation:

"According to the given data, the centre of the square loop will have an angle of 90 degree. sin and will be 45 degree as the diagonal from the two corners will divide the angle equally. Now, as each side of length of a will be conducting the current in the square loop, it will be multiplied by 4 and thereby we get B .

hope you get it now....

Answer 2

Explanation:

Metzger's theory This theory is one of the most accepted theories of tree form, and this theory tries to explain the shape of a tree as the most efficient design to counter wind forces. So, consider the tree stem to be a beam of uniform resistance to bending, anchored at the base.