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An electron gun with its collector at a potential of 100 V fires outelectrons in a spherical bulb containing hydrogen gas at lowpressure (∼10–2 mm of Hg). A magnetic field of 2.83 × 10–4 T curves the path of the electrons in a circular orbit of radius 12.0 cm. (Thepath can be viewed because the gas ions in the path focus the beamby attracting electrons, and emitting light by electron capture; thismethod is known as the ‘fine beam tube’ method.) Determinee/m from the data. |
| Answer» An electron gun with its collector at a potential of 100 V fires outelectrons in a spherical bulb containing hydrogen gas at lowpressure (∼10–2 mm of Hg). A magnetic field of 2.83 × 10–4 T curves the path of the electrons in a circular orbit of radius 12.0 cm. (Thepath can be viewed because the gas ions in the path focus the beamby attracting electrons, and emitting light by electron capture; thismethod is known as the ‘fine beam tube’ method.) Determinee/m from the data. | |