Evaluate the net force on a existing loop in an outside magnetic fieldEvaluate the net torque on a existing loop in an outside magnetic fieldDefine the magnetic dipole moment of a existing loop


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Motors are the the majority of common application of magnetic pressure on current-moving wires. Motors contain loops of wire in a magnetic area. When present is passed through the loops, the magnetic area exerts torque on the loops, which rotates a shaft. Electrical power is converted into mechanical work in the process. Once the loop’s surchallenge area is aligned via the magnetic field, the direction of existing is reversed, so tbelow is a regular torque on the loop ((Figure)). This reversal of the current is done with commutators and also brushes. The commutator is collection to reverse the existing circulation at collection points to store constant movement in the motor. A fundamental commutator has 3 call areas to avoid and also dead spots wright here the loop would have actually zero instantaneous torque at that point. The brushes push versus the commutator, developing electric call in between components of the commutator throughout the spinning movement.


A streamlined version of a dc electric motor. (a) The rectangular wire loop is put in a magnetic field. The forces on the wires closest to the magnetic poles (N and also S) are oppowebsite in direction as established by the right-hand rule-1. Because of this, the loop has actually a net torque and rotates to the position presented in (b). (b) The brushes currently touch the commutator segments so that no present flows via the loop. No torque acts on the loop, yet the loop continues to spin from the initial velocity offered to it in component (a). By the moment the loop flips over, current flows with the wires again however now in the opposite direction, and the process repeats as in component (a). This causes continuous rotation of the loop.


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The magnetic pressure on a right current-transferring wire of length l is given by
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motor (dc)loop of wire in a magnetic field; once current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft; electric energy is converted right into mechanical job-related in the process