1 / 8

Bellwork

Bellwork A wire carrying a current of 3.0 A is in a uniform magnetic field. The wire makes an angle of 15° with the field. The wire is 35 cm in length and the force on the wire is 0.80 N. What is the strength of the magnetic field?. Force on a Charged Particle.

georgio-betagh
Télécharger la présentation

Bellwork

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bellwork A wire carrying a current of 3.0 A is in a uniform magnetic field. The wire makes an angle of 15° with the field. The wire is 35 cm in length and the force on the wire is 0.80 N. What is the strength of the magnetic field?

  2. Force on a Charged Particle • Charged particles are not confined to a wire. • Cathode-ray tube in monitors and TVs use magnetic fields to deflect electrons to form pictures on the screen. • The screen in coated with phosphor to glow when an electron hits it.

  3. The force produced by a magnetic field on a charged particle depends on it’s velocity, it’s charge (+/-), andon the strength of the field. • Direction of force is perpendicular to both the velocity of the particle and the B-field. • F= Bqv • B- magnetic field (T) • q- charge of particle (C) (no negatives) • v- velocity of particle (m/s)

  4. To determine directions: • Use the 2nd RHR: • Thumb point in the direction of the velocity • Fingers faces the direction of the field • Your palm points to the direction of the force on a POSITIVE particle. It will be opposite for a NEGATIVE particle.

  5. Practice • A proton travels at 3.0 x 106 m/s to the west through a uniform magnetic field of 0.04 T toward the north. What is the force on the proton?

  6. An electron travels at 2.7 x 105 m/s to the west through a uniform magnetic field of 0.07 T toward the north. What is the force on the electron?

  7. Review • 1st RHR • Magnetic Field Lines • F = BIL • 2nd RHR • F = Bqv • 3rd RHR

More Related