The factors that affect the strength of a magnetic field at a point due to a straight current carrying conductor are:

Q. List the factors on which the strength of magnetic field produced by
(a) a current-carrying straight conductor
(b) current carrying solenoid depends.

Q. Two long straight conductors $AOB$ and $COD$ are perpendicular to each other and carry currents $I_1$ and $I_2$. The magnitude of the magnetic field at a point $P$ at a distance $a$ from the point $O$ in a direction perpendicular to the plane $ABCD$ is

Q. Consider the following statements about the Oersted experiment.

Statement $\text{P}:$ The magnetic field due to a straight current carrying conductor is in the form of circular loops around it.

Statement $\text{Q}:$The magnetic field due to a current carrying conductor is strong at far points from the conductor, compared to the near points.

Q. State the rule to determine the direction of a
(a) magnetic field produced around a straight conductor-carrying current,
(b) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and
(c) current induced in a coil due to its rotation in a magnetic field