Physics 5054 · O Level · Electromotive force and potential difference

Electromotive force and potential difference — practice question

Which particles come from the hot filament of a cathode-ray oscilloscope (c.r.o.), and what type of field is used to speed them up?

  • Aelectrons; electric
  • Belectrons; magnetic
  • Cprotons; electric
  • Dprotons; magnetic

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