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.
How do you determine the direction of the magnetic field created by a moving positive charge?
Use the right-hand rule: Thumb in the direction of velocity, fingers in the direction of the position vector from the charge. Palm points in the direction of the magnetic field.
How do you determine the direction of the magnetic force on a moving positive charge in a magnetic field?
Use the right-hand rule: Thumb points in the direction of velocity, fingers point in the direction of the magnetic field. Palm points in the direction of the force.
How do you determine the direction of the magnetic force on a moving negative charge in a magnetic field?
Use the right-hand rule: Thumb points in the direction of velocity, fingers point in the direction of the magnetic field. Palm points in the direction of the force. Reverse the direction of the palm to find the force on a negative charge.
Steps to calculate magnetic force.
- Identify charge (q), velocity (v), magnetic field (B), and angle (). 2. Use the formula to find the magnitude. 3. Use the right-hand rule to find the direction.
Describe the steps to determine the radius of the circular path a charged particle follows in a uniform magnetic field.
- Equate the magnetic force () to the centripetal force (). 2. Solve for the radius, .
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.