Discussion
Read the following text :
When a negatively charged rod is brought near an uncharged electroscope,
(a) the electroscope leaves move further apart
(b) both the electroscope leaves acquire similar charge
(c) the negative charges pass on to the electroscope causing its leaves to move further apart
Of the above three statements :
Answer: A
(a) is an observation while (b) and (c) are inferences.
An observation is what can be perceived directly through the senses. One can see the leaves of the electroscope move further apart (a).
That the two leaves carry similar charge (b) and that negative charges move on to the electroscope (c) cannot be seen; they are explanations reasoned from the observed movement, so they are inferences. Options calling b or c observations are wrong.
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