Lorentz force is necessary for definition of magnetic field. It represents force operating on charged particle which moves in the electromagnetic field. Thanks to this force there is a redistribution of current on the section of the conductor. The similar effect is used in thermomagnetic and galvanomagnetic devices.
It is required to you
- - calculator.
Instruction
1. Define the direction of force of magnetic field (Lorentz force). Use for this purpose the rule of the left hand, or the rule of the gimlet. A palm of the left hand arrange so that lines of magnetic induction were included kind of into it, and four extended fingers put together in parallel each other designated the direction of the movement of a positive charge. As a result the thumb of the left hand unbent on a corner in 90 degrees will specify the direction of Lorentz force. If the rule of the gimlet is applied to negative charges, then four extended fingers arrange against the speed of the movement of charged particles.
2. Induction of magnetic field which is power characteristic of the field formed by electric current can be found on the given formula. Here r ₒ is a radius vector. He specifies a point in which we find force of magnetic field. Dl is length of the site forming magnetic field, and I – respectively, current. In the SI system µ ₒ - a constant magnetic, equal works 4π on 10 in-7 degrees.
3. Define the module of Lorentz force as the work of the following sizes: the module of a charge of the carrier, speed of the ordered movement of the carrier on the conductor, the module of induction of magnetic field, a sine of the angle between vectors of the specified speed and magnetic induction. This formula is fair at all values of speed of charged particle.
4. Write down expression and make necessary calculations.