Cathode rays are accelerated by a P.D. of 2000 volt and enter the plates of a Thomson tube as a collimated beam. The P.D. between the plates is 800 volt and the plates are separated by a distance of 1 cm. The path of the beam of electrons is normal to the electrical field. Find the magnetic field that must be applied perpendicular to the beam over the electrical field so that the beam is undeviated. e/m = 1.76 x 1011 C/kg.
Cathode rays are accelerated by a P.D. of 2000 volt and enter the plates of a Thomson tube as a collimated beam. The P.D. between the plates is 800 volt and the plates are separated by a distance of 1 cm. The path of the beam of electrons is normal to the electrical field. Find the magnetic field that must be applied perpendicular to the beam over the electrical field so that the beam is undeviated. e/m = 1.76 x 1011 C/kg.
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Transcribed Image Text:Cathode rays are accelerated by a P.D. of 2000 volt and enter the plates of a Thomson tube as a
collimated beam. The P.D. between the plates is 800 volt and the plates are separated by a
distance of 1 cm. The path of the beam of electrons is normal to the electrical field. Find the
magnetic field that must be applied perpendicular to the beam over the electrical field so that
the beam is undeviated. e/m = 1.76 × 1011 C/kg.
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