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JAMB Physics 2009 Question 39

Question 39

Electrostatics

If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will

  1. A.close up.
  2. B.become positively charged.
  3. C.become negatively charged.
  4. D.open further.
Show the answer and explanation

Answer: A (close up.)

Explanation

The positive rod attracts electrons from the leaves up to the cap. The leaves lose their negative charge, so they collapse (close up).