Magnetic Field due to Current in a Straight Wire

Two very long straight parallel wires, parallel to $y$-axis, carry currents $4I$ and $I$, along $+y$-direction and $-y$-direction, respectively. The wires pass through the $x$-axis at the points $(d, 0, 0)$ and $(-d, 0, 0)$ respectively. The graph of magnetic field $z$-component as one moves along the $x$-axis from $x=-d$ to $x=+d$, is best given by

Equal current i is flowing in three infinitely long wires along positive x, y and z directions. The magnitude field at a point (0, 0, -a) would be:

Find the magnetic field at $P$ due to the arrangement shown.

Two mutually perpendicular conductors carrying currents $I_1 \text{and} I_2$ respectively, lie in one plane. Locus of the point at which the magnetic induction is zero, is a:

Find $\overrightarrow{B}$ at the origin, due to the long wire, carrying a current $i$.

Calculate the magnetic field at the centre of a square loop which carries a current of $1.5 \mathrm{A}$, length of each side is $50 \mathrm{cm}$

Two infinitely long wires carry currents $4 \mathrm{A}$ and $3 \mathrm{A}$ placed along $X$-axis and $Y$-axis respectively. Magnetic field at a point $P\left(0,0, d\right) \mathrm{m}$ will be ________$T$.

Consider a long straight conducting wire. The magnetic field is determined as $B$ at a distance of $5 \mathrm{cm}$ from the wire. The field at $40 \mathrm{cm}$ from the wire would be

$PQ$ and $RS$ are long parallel conductors separated by certain distance. $M$ is the mid-point between them (see the figure). The net magnetic field at $M$ is $B$. Now, the current $4 \mathrm{A}$ is switched off. The field at $M$ now becomes $B$.

The strength of magnetic field produced by current carrying circular wire_____if the number of turns of the wire increases.

An electric current-carrying wire behaves like a _____.

A region around a magnetic material or a moving electric charge within which the force of magnetism acts is called _____.

Name some materials used for making permanent magnets.

The magnetic field is _____near the centre of the loop.

A metallic wire carrying an electric current is associated with it a_____.

In an electric transmission line current is flowing along north direction. On considering earth's magnetic field to be negligible, find the direction of magnetic field above the electric transmission line-

A straight wire carrying a current of $13 \mathrm{A}$ is bent into a semi-circular arc of radius $2 \mathrm{cm}$ as shown in the figure. The magnetic field is $1.5\times {10}^{-4} \mathrm{T}$ at the centre of the arc, then the magnetic field due to the straight segment is

What would be the magnetic field produced due to a long straight wire carrying 3 A current at a point 1/2 $\mathrm{m}$ away from it?

A long straight wire is carrying current $I$ in $+z$ direction. The $x-y$ plane contains a closed circular loop carrying current $I_2$ and not encircling the straight wire. The force on the loop will be

Two long parallel wires carry currents $I_1$ and $I_2$ $\left(I_1>I_2\right)$ . When the currents are in the same direction, the magnetic field at a point midway between the wires is $10\mu T$ . If the direction of $I_2$ is reversed, the field becomes $40\mu T$ . The ratio $\frac{I_1}{I_2}$ is