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A magnetic field set up using Helmholtz coils (described in Exercise4.16) is uniform in a small region and has a magnitude of 0.75 T. Inthe same region, a uniform electrostatic field is maintained in adirection normal to the common axis of the coils. A narrow beam of(single species) charged particles all accelerated through 15 kVenters this region in a direction perpendicular to both the axis ofthe coils and the electrostatic field. If the beam remains undeflectedwhen the electrostatic field is 9.0 × 10–5 V m–1, make a simple guessas to what the beam contains. Why is the answer not unique? |
| Answer» A magnetic field set up using Helmholtz coils (described in Exercise4.16) is uniform in a small region and has a magnitude of 0.75 T. Inthe same region, a uniform electrostatic field is maintained in adirection normal to the common axis of the coils. A narrow beam of(single species) charged particles all accelerated through 15 kVenters this region in a direction perpendicular to both the axis ofthe coils and the electrostatic field. If the beam remains undeflectedwhen the electrostatic field is 9.0 × 10–5 V m–1, make a simple guessas to what the beam contains. Why is the answer not unique? | |