All Flashcards
What is the effect of increasing the current in a wire placed in a magnetic field?
The magnetic force on the wire increases proportionally.
What happens when the angle between a current-carrying wire and a magnetic field is 0 degrees?
The magnetic force on the wire is zero.
What is the effect of placing a current-carrying loop in a magnetic field?
The loop experiences a torque, causing it to rotate (unless perfectly aligned with the field).
What happens when two parallel wires carry current in the same direction?
The wires attract each other.
What is the effect of increasing the distance from a long, straight current-carrying wire?
The magnetic field strength decreases.
What happens when a closed loop of wire is placed in a uniform magnetic field?
The net magnetic force on the loop is zero.
In the image of the wire loop, what do the variables represent in the equation for torque?
N: number of turns in the loop, I: current in the loop, A: area of the loop, B: magnetic field strength, θ: angle between the normal to the loop and the magnetic field.
In the image illustrating the Right-Hand Rule for wires, what do the thumb, fingers, and palm represent?
Thumb: Direction of the current (I), Fingers: Direction of the magnetic field (B), Palm: Direction of the force (F).
What is the effect of increasing the current in a wire on the magnetic field around it?
Increasing the current increases the strength of the magnetic field around the wire.
What happens when a current-carrying loop is placed in a uniform magnetic field?
The loop experiences a torque that causes it to rotate, aligning its magnetic moment with the external field.
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 orienting a current-carrying wire perpendicular to a magnetic field?
The magnetic force on the wire is maximum.
What happens when two parallel wires carry current in the same direction?
The wires attract each other.
What happens when two parallel wires carry current in opposite directions?
The wires repel each other.