18 Questions
What is the magnitude of the force acting on side 2?
FibB cos 0
Why do the forces F1 and F3 not move the loop up or down?
Because they have opposite directions
What is the orientation of the loop in the magnetic field?
Perpendicular
What is the net torque produced by forces F1 and F3?
iabB sin 0
How can we find the direction of the normal vector?
Use the right-hand rule
Why does the torque tend to align the normal vector of the loop with the magnetic field?
Due to the net torque produced by F1 and F3
What does the normal vector represent?
Orientation of the loop
What is the net force on the loop?
Vector sum of forces on its four sides
What is the moment arm of the torque due to forces F1 and F3?
(b/2) sin
How does increasing the number of loops in the coil affect the magnetic forces?
Increases the overall force
How is the net torque calculated?
By summing torques from each side
How can you find the direction of the normal vector using the right-hand rule?
Curl fingers in direction of current, thumb points normal
What is the net force on a current-carrying coil in a uniform external magnetic field?
Zero
What is the formula for the magnitude of the torque acting on a current-carrying coil in a magnetic field?
$T = N i A B \sin \theta$
What type of forces are responsible for the work done by electric motors?
Magnetic forces
In a simple motor, what consists of the single current-carrying loop immersed in a magnetic field?
The motor
What does a rectangular loop of current in a magnetic field indicate?
Magnetic forces on sides
What are the key factors in the relationship between torque magnitude and a current-carrying coil in a magnetic field?
Number of turns, Area, Current, Field magnitude, Angle
Learn how to sketch a rectangular loop of current in a magnetic field, indicating magnetic forces, current direction, normal vector, and torque. Understand the magnetic forces acting on sections of a current-carrying coil in a uniform external magnetic field.
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