Purchase Solution

Changing magnetic field

Not what you're looking for?

Ask Custom Question

Transcranial magnetic stimulation (TMS) is a noninvasive method for studying brain function, and possibly for treatment as well. In this technique, a conducting loop is held near a person's head. When the current in the loop is changed rapidly, the magnetic field it creates can change at a rate of {see attachment}. This rapidly changing magnetic field induces an electric current in a restricted region of the brain that can cause a finger to twitch, a bright spot to appear in the visual field, or a feeling of complete happiness to overwhelm a person. If the magnetic field changes at the previously mentioned rate over an area of {see attachment}, what is the induced emf?

**Please see attachment for details and diagram

Attachments
Purchase this Solution
Solution Summary

This solution is provided in 91 words. It discusses Faraday's Law and how this relates to the emf voltage. It also uses this equation to calculate the induced emf magnitude.

Solution Preview

The concept of Faraday's Law is that any change in the magnetic environment of a coil of wire will cause a ...

Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Basic Physics

This quiz will test your knowledge about basic Physics.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

View More Free Quizzes
Related BrainMass Solutions

  • Magnetic Field Increases at Constant Rates

    The expert examines magnetic field increases at constant rates. Non-conservative fields that are generated by a changing magnetic field are analyzed.

  • Faraday's law of induction: Example problem

    The induced emf is equal to E = - N delta (flux)/delta (time) = - N delta (magnetic field X area) / delta (time) When the external magnetic field B is changing, delta (magnetic field) is non-zero. Then, there will be an induced emf.

  • Electromagnetic Induction

    (1) if the area of the loop increases, there will be an induced EMF in the loop (2) if the loop is rotated in the magnetic field, there will be an induced EMF in the loop (3) if the magnetic field is changing, and the rate of change decreases, then

  • Electromagnetic theory for a circular loop

    When we rotate the loop, although its total area is constant, we change the projection of this area on the axis perpendicular to the field's direction, thus changing the magnetic field flux.

  • Physics: What does the applet suggest about an electric current?

    As the charge on the capacitor changes, the electric field between the plates changes. A changing electric field generates a magnetic field and a changing magnetic field generates an electric field.

  • Electron in orbit of a hydrogen like atom.

    Hence the induced dipole moment is opposite to the magnetic field (in to the paper) applied.

  • Voltage Inside a Magnetic Field

    285532 Voltage Inside a Magnetic Field The square wire in below figure has a side of 10 cm and is in a magnetic field of strength 0.18 T. If the magnetic field decreases at a rate of 0.1 T/s, find the reading of the voltage meter.

  • Induction of a current in a wire

    34705 Induction of a current in a wire A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.84 V and a current of 3.7 A are induced in the coil.

  • Electricity & Magnetism Qualitative Problems

    The same (qualitatively) happens to a point magnetic dipole in a diamagnetic: field B has the same field lines as that in vacuum but its magnitude is reduced by polarization by factor μ. 13) P for changing electric fields; M for changing magnetic

View More Related Solutions