Moving charges and megnatism

What is a moving charge?

A moving charge refers to a charge (positive or negative) that is in motion, generating an electric current.

How do moving charges create magnetic fields?

Moving charges create magnetic fields due to the movement of electrons, which generates a magnetic force according to the right-hand rule.

Define magnetic field.

A magnetic field is a vector field around a magnet that exerts a magnetic force on charged particles and is represented by magnetic field lines.

What is the right-hand rule?

The right-hand rule is a mnemonic used to determine the direction of magnetic force, current, or field lines and involves positioning your thumb and fingers in specific orientations.

What is the relationship between electric current and magnetic field?

An electric current flowing through a conductor generates a magnetic field around it, with the field direction determined by the right-hand rule.

What happens when a charged particle moves through a magnetic field?

A charged particle moving through a magnetic field experiences a magnetic force, which alters its path, typically resulting in circular or helical motion.

What is electromagnetism?

Electromagnetism is the branch of physics that studies the interactions between electric charges and magnetic fields.

What is Faraday's Law of electromagnetic induction?

Faraday's Law states that a changing magnetic field within a closed loop induces an electromotive force (emf) in the wire.

What is magnetic flux?

Magnetic flux is the measure of the amount of magnetic field passing through a given area, calculated as the product of the magnetic field strength and the area.

How do solenoids generate a magnetic field?

A solenoid generates a magnetic field when an electric current passes through its coil, creating a uniform magnetic field inside the solenoid.

What is the formula for the magnetic force on a moving charge?

The magnetic force (F) on a moving charge (q) is given by F = q(v × B), where v is the velocity vector and B is the magnetic field vector.

What is the formula for magnetic field around a straight current-carrying conductor?

The magnetic field (B) around a long straight conductor carrying current (I) is given by B = (μ₀ I) / (2πr), where μ₀ is the permeability of free space and r is the distance from the conductor.

What is the formula for the magnetic field inside a solenoid?

The magnetic field (B) inside a solenoid is given by B = μ₀(nI), where n is the number of turns per unit length and I is the current.

What is the formula for electromagnetic induction?

The induced electromotive force (emf) can be calculated using Faraday's Law: emf = -dΦ/dt, where Φ is the magnetic flux and t is time.

What is the formula for the magnetic flux?

Magnetic flux (Φ) is calculated as Φ = B·A·cos(θ), where B is the magnetic field strength, A is the area, and θ is the angle between the magnetic field and the normal to the surface.

What is the formula for the Lorentz force?

The Lorentz force (F) acting on a charged particle in an electric field (E) and magnetic field (B) is given by F = q(E + v × B).

Magnetic field due to a circular loop of current formula?

The magnetic field (B) at the center of a circular loop carrying current I is given by B = (μ₀ I) / (2R), where R is the radius of the loop.

What is the formula for a magnetic field of a toroid?

The magnetic field (B) inside a toroid is given by B = (μ₀NI) / (2πr), where N is the number of turns, I is the current, and r is the distance from the center of the toroid.

What is the formula for the motional emf?

The motional emf (ε) induced in a conductor of length L moving with velocity v in a magnetic field B is given by ε = B(Lv sin(θ)), where θ is the angle between the direction of motion and the magnetic field.

What is the formula for induced current?

The induced current (I) in a circuit can be calculated using Ohm's Law: I = emf/R, where R is the total resistance in the circuit.

What is the formula for the magnetic force on a moving charge?

The magnetic force (F) on a moving charge (q) is given by F = q(v × B), where v is the velocity vector and B is the magnetic field vector.