Magnetic Fields Due To Electric Current - MHT-CET Physics

Magnetic Effects of Electric Current and Electromagnetic Induction

Direction Rules for Magnetic Field and Force The direction of magnetic field and force due to electric current is determined using specific hand rules. These rules help in visualizing the orientation of magnetic field lines and the force experienced by...

For a long straight wire carrying current I, what is the expression for the magnetic field at a perpendicular distance r from the wire?

μ₀I/2πr

What is the magnetic dipole moment of a current-carrying coil with n turns, current I, and area A?

nIA

For a long straight wire carrying current I, what is the expression for the magnetic field at a perpendicular distance r from the wire?

μ₀I/2πr

What is the magnetic dipole moment of a current-carrying coil with n turns, current I, and area A?

nIA

Explain the Right Hand Rule (Thumb Rule) for determining magnetic field direction.

If a straight current-carrying conductor is held in the right hand, the thumb points in the direction of current, and the curled fingers indicate the direction of the magnetic field lines.

What is the Lorentz force on a charge $q$ in combined electric and magnetic fields?

The Lorentz force is the total force on a charge $q$ moving with velocity $\vec{v}$ in an electric field $\vec{E}$ and a magnetic field $\vec{B}$, given by $\vec{F}_{total} = q\vec{E} + q(\vec{v} \times \vec{B})$.