Magnetic Effects of Current

A cylindrical conductor of radius$R$ is carrying a constant current. The plot of the magnitude of the magnetic field$B$ with the distance $d$ from the centre of the conductor is correctly represented by the figure?

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole $\vec{m}.$ Which configuration has highest net magnetic dipole moment?

Two identical long conducting wires $AOB$ and $COD$ are placed at right angle to each other, with one above other such that ' $O$ ' is their common point for the two. The wires carry $I_{1}$ and $I_{2}$ currents,…

A very long conducting wire is bent in a semi- circular shape from $A$to $B$ as shown in figure. The magnetic field at point$P$ for steady current configuration is given by:

An infinitely long straight conductor carries a current of $5A$as shown. An electron is moving with a speed of $10^{5}ms^{-1}$parallel to the conductor. The perpendicular distance between the electron and the conductor…

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $I$ along the same direction is shown in Figure. Magnitude of force per unit length on the middle wire $B$ is…

In the product $\vec{F}=q(\vec{v}\times\,\vec{B})$ $=q\vec{v}\times\,\left(B\hat{i}+B\hat{j}+B_{0}\hat{k}\right)$ For $q=1$ and $\vec{v}=2\hat{i}+4\hat{j}+6\hat{k}$ and $\vec{F}=4\hat{i}-20\hat{j}+12\hat{k}$ What will…

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is $B.$ It is then bent into a circular coil of $n$ turns. The magnetic field at the centre of…

A rectangular coil (Dimension $5cm\times\,2.5cm$) with $100$ turns, carrying a current of $3A$ in the clock-wise direction, is kept centered at the origin and in the $X-Z$ plane. A magnetic field of $1T$ is applied…

A charge $q$ is spread uniformly over an insulated loop of radius $r$. If it is rotated with an angular velocity $\omega\,$ with respect to normal axis then magnetic moment of the loop is:

The magnitude of the magnetic field at the centre of an equilateral triangular loop of side $1\mathrm{}m$ which is carrying a current of $10\mathrm{}A$ is: [Take…

The dipole moment of a circular loop carrying a current I, is m and the magnetic field at the centre of the loop is $B_{1}$ . When the dipole moment is doubled by keeping the current constant, the magnetic field at the…