A square loop of side $a=6$ $\mathrm{cm}$ carries a current $I=1 \mathrm{A}$. Calculate magnetic induction $B (\mathrm{i}\mathrm{n} \mathrm{\mu }\mathrm{T})$ at point $P$, lying on the axis of loop and at a distance $x=\sqrt{7}$ $\mathrm{cm}$ from the center of loop.

A square loop, carrying a steady current $I$, is placed in a horizontal plane near a long straight conductor carrying a steady current $I_1$ at a distance $d$ from the conductor as shown in the figure. The loop will experience

In the given figure, the magnetic field at $\text{'}O\text{'}$.

The current in flowing along the path $ABCD$ of a cube (shown in the left figure) produces a magnetic field at the centre of cube of magnitude $B$. Dashed line depicts the non-conducting part of the cube.

Consider a cubical shape shown to the right which is identical in size and shape to the left. If the same current now flows in along the path $DAEFGCD$, then the magnitude of magnetic field at the centre will be

A square loop is made from a uniform wire as shown in the figure. If a battery is connected between the points $A \& C,$ then the magnitude of the magnetic field at the center of the square is