All Flashcards
What is the effect of increasing the current in a long, straight wire?
The magnetic field strength around the wire increases.
What happens when a charged particle enters a uniform magnetic field perpendicular to its velocity?
The particle undergoes cyclotron motion, moving in a circle.
What is the effect of orienting a current-carrying wire parallel to a magnetic field?
The magnetic force on the wire is zero.
What is the effect of increasing the distance from a current-carrying wire?
The magnetic field strength decreases.
What happens when the angle between a wire and a magnetic field increases from 30 to 90 degrees?
The magnetic force on the wire increases.
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?
- 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: .
What is the difference between Biot-Savart Law and Ampère’s Law?
Biot-Savart Law: Calculates the magnetic field from a small current segment, useful for complex geometries. Ampère’s Law: Relates the magnetic field around a closed loop to the enclosed current, useful for symmetrical situations.