2.5M+
Active Users Worldwide
80%
Improved Learning Retention
60%
Reduction in Laboratory Costs
Investigate how a magnetic field in the magnetic field simulation interacts with moving electric charges in the form of an electric current.
The magnetic on the electric current (magnetic force on a wire) is not measured directly. Instead, the reaction force on the magnet—according to Newton's third law—is measured.
⦁ Our experimental setup for the magnetic field virtual lab is shown in the following figure and is described as follows: ⦁ A permanent magnet assembly, comprised of six removable horseshoe magnets, is placed on a triple-beam balance, and ⦁ ⦁ Our experimental setup for the magnetic field virtual lab is shown in the following figure and is described as follows: ⦁ A permanent magnet assembly, comprised of six removable horseshoe magnets, is placed on a triple-beam balance, and the balance is then zeroed. ⦁ A variable current source is connected to the current balance assembly, which has at one end a removable wire loop etched onto a circuit board. ⦁ This wire loop is then placed into the permanent magnet assembly so the wire loop is perpendicular to the magnetic field but is not touching the magnets. ⦁ Then, when a current flows through the wire loop, a magnetic force on a wire is created. ⦁ Since the wire loop is stationary the magnetic force acts on the permanent magnet assembly causing its weight to either increase or decrease depending on the direction of the current and the orientation of the magnetic field. ⦁ The change in the magnet assembly's weight is due to the magnetic force given by: F = I L B
By the end of the magnetic field simulation, the student should be able to:
A current-carrying wire in a magnetic field experiences a force that is usually referred to as a magnetic force.
The magnitude and direction of this force depend on four variables:
The magnitude of the current
The length of the wire
The strength of the magnetic field
The angle between the field and the wire.
Where the magnitude and direction of the current (I); the strength of the magnetic field (B); the length of the wire (L); and the angle between the field and the wire (ϴ). Using the equipment included in the Magnetic Forces on Wires
Experiment, all four variables (I, B, L, and ) can be varied while measuring the resulting magnetic force.
If the current in a wire, I, is perpendicular to the magnetic field, B, then sinθ=1 and the magnetic force: F = I L B
The direction of magnetic force F can be determined by using the right–hand rule, illustrated in the following figure.
If current I is passing through a conductor of known length L, located in a magnetic field B, the force F exerted on the conductor can be measured using a quadruple-beam balance, (Actually, the reaction force – Newton’s 3rd law – on the magnet will be measured).
If the force is measured for several known currents and then plotted as a function of current, the slope of the resulting curve is the product B sin.
Once the direction of the magnetic field is also known, this slope can be used to determine the magnitude B of the magnetic field.
A stationary or moving electric charge will experience a force when placed in an electric field.
On the other hand, an electric charge has to be moving to experience a force due to a magnetic field. A current in a wire is due to moving electrons. Therefore, a current-carrying wire will experience a force when placed in a magnetic field.
Measuring the force exerted by a magnetic field on the wire with a known current flowing through it offers one method to determine the strength of the magnetic field.
With the PASCO SF-8607 Basic Current Balance, you can vary three of the variables in the equation-the current, the length of wire, and the strength of the magnetic field-and measure the resulting magnetic force.
By adding the SF-8608 Current Balance Accessory, you can vary the angle between the wire and the magnetic field, thereby performing a complete investigation into the interaction between a current carrying wire and a magnetic field.
A magnetic force is created when a current passes through the circuit board wire loop. This force acts on the permanent magnet assembly causing a change in its weight.
The change in the magnet assembly's weight is directly proportional to the magnetic force.
I love the idea of virtual labs. It's gonna be something that takes our R&D and work in labs to another level. And I look forward to seeing what PraxiLabs can do with it.
Michelle Anderson, Head of Innovation
IE University - Spain
Although there are now several vendors offering virtual reality software for physics labs, there is only one that offers a realistic, I feel like I’m in a real lab solution: PraxiLabs.
Dr. William H. Miner, Jr., Professor of Physics
Palm Beach State College, Boca Raton, FL
PraxiLabs offered my students a chance to actively engage with the material. Instead of watching videos on a topic, they could virtually complete labs and realize the practical applications of class topics. This is a quality alternative to in-person labs.
Crys Wright, Teaching Assistant
Texas A&M University, USA
With the onset of the COVID-19 pandemic, we found ourselves in a situation that forced us to act quickly to find the best solution available to provide our students with a quality molecular genetics laboratory experience.
Korri Thorlacius, B.Sc., Biology Lab. Instructor
Biology Department - Kwantlen Polytechnic University
