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What is the effect of a charged particle moving perpendicular to a uniform magnetic field?
The particle undergoes cyclotron motion, moving in a circular path.
What happens to the magnetic field strength as you move further away from a long, straight current-carrying wire?
The magnetic field strength decreases.
What happens when the angle between a current-carrying wire and a magnetic field is 90 degrees?
The force on the wire is maximized.
How do you determine the direction of magnetic force on a positive charge using the right-hand rule?
Point your thumb in the direction of the velocity, your fingers in the direction of the magnetic field, and your palm will point in the direction of the force.
How do you determine the direction of magnetic force on a current-carrying wire using the right-hand rule?
Point your thumb in the direction of the current, your fingers in the direction of the magnetic field, and your palm will point in the direction of the force on the wire.
What are the steps to apply Ampère’s Law?
1. Choose an Amperian loop. 2. Calculate the line integral of the magnetic field around the loop. 3. Determine the current enclosed by the loop. 4. Apply the formula: $\oint B \cdot dl = \mu_0 I_{enc}$.
What is the effect of breaking a bar magnet?
You get two smaller bar magnets, each with its own north and south pole.
What happens when a compass is placed in a magnetic field?
The compass needle (a tiny dipole) aligns itself with the external magnetic field.
What is the effect of increasing the density of magnetic field lines?
The strength of the magnetic field increases.
What causes magnetic dipoles to arise?
The circular or rotational motion of electric charges (electrons).
What happens when like poles of magnets are brought near each other?
They repel each other.
What happens when opposite poles of magnets are brought near each other?
They attract each other.