153196 A part of a long wire carrying a current $i$ is bent into a circle of radius $r$ as shown in figure. the net magnetic field at the centre $O$ of the circular loop is

153197 To measured a magnetic field between the magnetic poles of a loud speaker, a small coil having 30 turns and $2.5 \mathrm{~cm}^{2}$ area is placed perpendicular to the field and removed immediately. If the total charge flown though the coil is $7.5 \times 10^{-3} \mathrm{C}$ and the total resistance of wire and galvanometer is $0.3 \Omega$, then the magnitude of the magnetic field is

153198 The magnetic field at the centre $C$ of the arrangement shown in figure is

153199 A circular loop and an infinitely long straight conductor carry equal currents, as shown in the figure. The net magnetic field at the cetnre of the loop is $B_{1}$, when the current in the loop is clockwise and $B_{2}$ when the current in the loop is anti-clockwise.

Then, $\frac{B_{1}}{B_{2}}$ is

153196 A part of a long wire carrying a current $i$ is bent into a circle of radius $r$ as shown in figure. the net magnetic field at the centre $O$ of the circular loop is

153197 To measured a magnetic field between the magnetic poles of a loud speaker, a small coil having 30 turns and $2.5 \mathrm{~cm}^{2}$ area is placed perpendicular to the field and removed immediately. If the total charge flown though the coil is $7.5 \times 10^{-3} \mathrm{C}$ and the total resistance of wire and galvanometer is $0.3 \Omega$, then the magnitude of the magnetic field is

153198 The magnetic field at the centre $C$ of the arrangement shown in figure is

153199 A circular loop and an infinitely long straight conductor carry equal currents, as shown in the figure. The net magnetic field at the cetnre of the loop is $B_{1}$, when the current in the loop is clockwise and $B_{2}$ when the current in the loop is anti-clockwise.

Then, $\frac{B_{1}}{B_{2}}$ is

153196 A part of a long wire carrying a current $i$ is bent into a circle of radius $r$ as shown in figure. the net magnetic field at the centre $O$ of the circular loop is

153197 To measured a magnetic field between the magnetic poles of a loud speaker, a small coil having 30 turns and $2.5 \mathrm{~cm}^{2}$ area is placed perpendicular to the field and removed immediately. If the total charge flown though the coil is $7.5 \times 10^{-3} \mathrm{C}$ and the total resistance of wire and galvanometer is $0.3 \Omega$, then the magnitude of the magnetic field is

153198 The magnetic field at the centre $C$ of the arrangement shown in figure is

153199 A circular loop and an infinitely long straight conductor carry equal currents, as shown in the figure. The net magnetic field at the cetnre of the loop is $B_{1}$, when the current in the loop is clockwise and $B_{2}$ when the current in the loop is anti-clockwise.

Then, $\frac{B_{1}}{B_{2}}$ is

153196 A part of a long wire carrying a current $i$ is bent into a circle of radius $r$ as shown in figure. the net magnetic field at the centre $O$ of the circular loop is

153197 To measured a magnetic field between the magnetic poles of a loud speaker, a small coil having 30 turns and $2.5 \mathrm{~cm}^{2}$ area is placed perpendicular to the field and removed immediately. If the total charge flown though the coil is $7.5 \times 10^{-3} \mathrm{C}$ and the total resistance of wire and galvanometer is $0.3 \Omega$, then the magnitude of the magnetic field is

153198 The magnetic field at the centre $C$ of the arrangement shown in figure is

153199 A circular loop and an infinitely long straight conductor carry equal currents, as shown in the figure. The net magnetic field at the cetnre of the loop is $B_{1}$, when the current in the loop is clockwise and $B_{2}$ when the current in the loop is anti-clockwise.

Then, $\frac{B_{1}}{B_{2}}$ is