Class 8 Science Some Natural Phenomena: NCERT Solutions for Question 3
Write T against true and F against false in the following statements:
(a) Like charges attract each other (T/F)
(b) A charged glass rod attract a charged plastic straw (T/F)
(c) Lightning conductor cannot protect a building from lightning (T/F)
(d) Earthquakes can be predicted in advance (T/F)
(a) False
This statement is false because like charges repel each other whereas opposite charges attracts each other.
(b) True
This statement is true because a charged plastic straw has negative charge and a charged glass rod acquires positive charge. As we know opposite charge attract each other, so the charged glass rod attracts the charged plastic straw.
(c) False
This statement is false because a lightening conductor conducts all the atmospheric charges to the Earth directly during a lightening, leaving the building safe.
(d) False
This statement is false because there is no such instrument which detect the upcoming earthquake.
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