State whether the following statements are true or false :
(a) Like charges attract each other.
(b) A charged glass rod attracts a charged plastic straw.
(c) Lightning conductor cannot protect a building from lightning.
(d) Earthquakes can be predicted in advance.
(e) An earthquake of magnitude 2 on Richter Scale is ten times as strong as an earthquake of magnitude 1 on the same Scale.
(f) The plates of earth's crust are continuously moving.
(g) An earthquake is measured and recorded by using an instrument called electrocardiograph.
Answers
Answer:
a. false
b. false
c.true
d.....
e...
True or False:
(a) This statement is false.
(b) This statement is true.
(c) This statement is false.
(d) This statement is false.
(e) This statement is true.
(f) This statement is false.
(g) This statement is false.
Explanation:
(a) Opposite charges attract each other and like charges repel each other.
(b) When objects have electrostatic charges, then object get attracted or repelled.
(c) When a lightening conductor is placed in the building, the charges from the lightening strike directly goes into lightening conductor than hitting the building directly.
(d) Earthquake is detected only when it occurs there is no instrument or method to determine it in advance.
(e) Each number in Richter scale increases with ten times in intensity.
(f) Earth's crust can never move continuously.
(g) Electrocardiograph is used to record electric activity of heart and seismometer is used to measure earthquake.