AP Physics 2: Algebra-Based Flashcards: Magnetism and Moving Charges
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 11 cards to help you master important concepts.
What is the relationship between the magnetic force vector and the plane containing the velocity and magnetic field vectors?
The magnetic force vector is always perpendicular to the plane formed by the velocity and magnetic field vectors.
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What is the relationship between the magnetic force vector and the plane containing the velocity and magnetic field vectors?
The magnetic force vector is always perpendicular to the plane formed by the velocity and magnetic field vectors.
A charged particle moves parallel to a uniform magnetic field. What is the magnitude of the magnetic force it experiences?
The magnetic force is zero. This is because the angle is 0 degrees, and the sine of 0 is 0, making the entire force equation equal to zero.
What rule is used to determine the direction of the magnetic force on a moving charged object?
The direction of the force is defined by the right-hand rule.
If the speed of a charged particle moving through a magnetic field is doubled, how does the magnitude of the magnetic force change (assuming all other factors are constant)?
The magnitude of the magnetic force also doubles, as the force is directly proportional to the magnitude of the velocity.
State the equation for the magnitude of the magnetic force ($F_B$) on a moving charged object.
The equation is $F_B = qvB\sin\theta$, where $\theta$ is the angle between the velocity and magnetic field vectors.
The magnitude of the magnetic force on a moving charge is proportional to what three quantities?
The force is proportional to the magnitude of the charge (q), the magnitude of the velocity (v), and the magnitude of the magnetic field (B).
What effect can an external magnetic field have on a charged object moving through it?
A magnetic field may exert a force on a charged object moving in that field.
What are the two distinct magnetic phenomena related to a single moving charge described in the text?
A single moving charge both produces its own magnetic field and can experience a force from an external magnetic field.
Describe the direction of the magnetic force relative to the charge's velocity and the magnetic field.
The direction of the force is perpendicular to both the direction of the magnetic field and the velocity of the charge.
What is the fundamental source of a magnetic field described in the text?
A single moving charged object produces a magnetic field.
At what angle between velocity and magnetic field is the magnetic force on a charge maximized?
The force is maximized when the angle is 90 degrees ($\sin(90^\circ)=1$), meaning the charge moves perpendicular to the magnetic field.