362647 An electric current passes through a long straight copper wire. At a distance 5\(cm\) from the straight wire, the magnetic field is \(B\). The magnetic field at 20 \(cm\) from the straight wire would be:

362648 \(PQ\) and \(RS\) are long parallel conductors separated by certain distance. \(M\) is the midpoint between them (see the figure). The net magnetic field at \(M\) is \(B\). Now, the current 2\(A\) is switched off. The field at \(M\) now becomes

362649 Two parallel, long wires carry currents \({i_{1}}\) and \({i_{2}}\) with \({i_1} > {i_2}.\) When the currents are in the same direction, the magnetic field at a point midway between the wire is 10 \(mT\) . If the direction of \({i_{2}}\) is reversed, the field becomes 30 \(mT\) . Find the ratio \({i_{1} / i_{2}}\).

362650 A straight conductor carrying current \(I\). If the magnetic field at a distance \(r\) is 0.4\(T\), then magnetic field at a distance 2\(r\) will be:

362647 An electric current passes through a long straight copper wire. At a distance 5\(cm\) from the straight wire, the magnetic field is \(B\). The magnetic field at 20 \(cm\) from the straight wire would be:

362648 \(PQ\) and \(RS\) are long parallel conductors separated by certain distance. \(M\) is the midpoint between them (see the figure). The net magnetic field at \(M\) is \(B\). Now, the current 2\(A\) is switched off. The field at \(M\) now becomes

362649 Two parallel, long wires carry currents \({i_{1}}\) and \({i_{2}}\) with \({i_1} > {i_2}.\) When the currents are in the same direction, the magnetic field at a point midway between the wire is 10 \(mT\) . If the direction of \({i_{2}}\) is reversed, the field becomes 30 \(mT\) . Find the ratio \({i_{1} / i_{2}}\).

362650 A straight conductor carrying current \(I\). If the magnetic field at a distance \(r\) is 0.4\(T\), then magnetic field at a distance 2\(r\) will be:

362647 An electric current passes through a long straight copper wire. At a distance 5\(cm\) from the straight wire, the magnetic field is \(B\). The magnetic field at 20 \(cm\) from the straight wire would be:

362648 \(PQ\) and \(RS\) are long parallel conductors separated by certain distance. \(M\) is the midpoint between them (see the figure). The net magnetic field at \(M\) is \(B\). Now, the current 2\(A\) is switched off. The field at \(M\) now becomes

362649 Two parallel, long wires carry currents \({i_{1}}\) and \({i_{2}}\) with \({i_1} > {i_2}.\) When the currents are in the same direction, the magnetic field at a point midway between the wire is 10 \(mT\) . If the direction of \({i_{2}}\) is reversed, the field becomes 30 \(mT\) . Find the ratio \({i_{1} / i_{2}}\).

362650 A straight conductor carrying current \(I\). If the magnetic field at a distance \(r\) is 0.4\(T\), then magnetic field at a distance 2\(r\) will be:

362647 An electric current passes through a long straight copper wire. At a distance 5\(cm\) from the straight wire, the magnetic field is \(B\). The magnetic field at 20 \(cm\) from the straight wire would be:

362648 \(PQ\) and \(RS\) are long parallel conductors separated by certain distance. \(M\) is the midpoint between them (see the figure). The net magnetic field at \(M\) is \(B\). Now, the current 2\(A\) is switched off. The field at \(M\) now becomes

362649 Two parallel, long wires carry currents \({i_{1}}\) and \({i_{2}}\) with \({i_1} > {i_2}.\) When the currents are in the same direction, the magnetic field at a point midway between the wire is 10 \(mT\) . If the direction of \({i_{2}}\) is reversed, the field becomes 30 \(mT\) . Find the ratio \({i_{1} / i_{2}}\).

362650 A straight conductor carrying current \(I\). If the magnetic field at a distance \(r\) is 0.4\(T\), then magnetic field at a distance 2\(r\) will be: