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When cathode rays are deflected onto the electrode of an electrometer…

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CHEMISTRY

When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes?

A. Bipolar

B. Negatively charged

C. Positively charged

D. Neutral

QUICK ANSWER…

B

DETAILS…

Here, it is assumed that the instrument was initially neutral; when cathode rays, which are negatively charged particles are deflected unto its electrode, the instrument will become negatively charged. This is because it gained extra negatively charged electrons.

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Now for the right answer to the above question:

  1. Option A is incorrect. not bipolar.
  2. Option B is correct. negatively charged because cathode rays are negatively charged electrons.
  3. C is incorrect. not positively charged.
  4. D is not the correct answer. not neutral.

KEY-POINTS…

You may please note these/this:

  • Cathode rays are in fact electrons.
  • They are negatively charged.
  • When deflected towards an instrument, it renders the instrument negative in charge.
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/ culled from 2020 JAMB-UTME chemistry past question 35 /

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