All Flashcards
What is the effect of increasing the velocity of a charged particle moving in a magnetic field?
Increases the magnitude of the magnetic force on the particle.
What is the effect of increasing the strength of the magnetic field on a moving charge?
Increases the magnitude of the magnetic force on the charge.
What happens when a moving charge enters a region with both electric and magnetic fields?
The charge experiences both electric and magnetic forces, and its motion is determined by the vector sum of these forces.
What causes the Hall effect?
A magnetic field perpendicular to the direction of moving charges in a conductor causes a buildup of charge on one side, creating a potential difference.
What is the effect of a magnetic force acting as a centripetal force on a charged particle?
The charged particle moves in a circular path.
What happens when the angle between the velocity vector and magnetic field vector is 0 or 180 degrees?
The magnetic force on the charge is zero.
What are the key differences between electric and magnetic forces?
Electric Force: Acts on both stationary and moving charges, acts along the field line. | Magnetic Force: Acts only on moving charges, acts perpendicular to both the velocity and magnetic field.
Compare the motion of a charged particle in an electric field versus a magnetic field.
Electric Field: Particle accelerates in the direction of (or opposite to) the field, resulting in a change in speed. | Magnetic Field: Particle moves in a circle (or helix) with constant speed, changing direction but not speed.
Compare the effect of force when the angle between velocity and magnetic field is 0 degrees and 90 degrees.
0 degrees: Force is zero, no effect. | 90 degrees: Force is maximum, particle experiences maximum deflection.
Compare the factors affecting the strength of magnetic and electric forces.
Magnetic Force: Depends on charge, velocity, magnetic field strength, and the angle between velocity and field. | Electric Force: Depends on charge and electric field strength.
Compare the effect of electric and magnetic fields on the kinetic energy of a charged particle.
Electric Field: Can change the kinetic energy of the particle by doing work on it. | Magnetic Field: Does not change the kinetic energy of the particle; it only changes the direction of motion.
Define magnetic field.
A region around a magnet or moving charge within which a magnetic force is exerted.
Define magnetic force.
The force exerted on a moving charge or current-carrying wire in a magnetic field.
Define Hall effect.
The creation of a potential difference (Hall voltage) across a conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current.
Define velocity vector.
A vector quantity that represents the rate of change of an object's position with respect to time, including both speed and direction.
Define the term 'position vector'.
A vector pointing from a reference point to the current location of an object.
Define electric force.
The force exerted on a charged particle by an electric field.