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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)
$(a)$. Like charges attract each other$\rightarrow (F)$
Explanation:
Two like charges repels each other whereas, unlike charges attract each other.
$(b)$. A charged glass rod attracts a charged plastic straw$\rightarrow(T)$
Explanation:
A glass rod is charged positively while a plastic straw is charged negatively. Unlike charges, attract each other. Therefore, A charged glass rod attracts a charged plastic straw.
$(c)$. Lightning conductors cannot protect a building from lightning$\rightarrow (F)$
Explanation:
A lightning conductor is a device that is used for protecting buildings from lightning during thunderstorms. One end of the lightning conductor is set free in the air and the other end is buried deep in the earth while it is used in building walls.
$(d)$. Earthquakes can be predicted in advance$\rightarrow (F)$
Explanation:
So far no such device has been made that can detect an earthquake before it occurs. Therefore, earthquakes can be predicted in advance.
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- Find FIRST & FOLLOW for the following Grammar\nE → E + T|T\nT → T ∗ F|F\nF → (E)|id
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