NATURAL
FORCES
L-
16
Q.1.
Name the following:
1. Other name of indirect charging method.
2. The process of transferring of charge from a
charged body to the earth.
3. SI unit of electric charge.
4. The mutual push between the two bodies (not in
contact with one another) away from one another.
5. The branch of science which deals with the study
of earthquakes.
6. A body which does not have electric charge.
7. The device which works on transfer of charges.
8. A metallic conductor fixed on tall buildings,
such that it conducts the atmospheric electricity into the earth.
9. The place and intensity of earthquake where
recently it had occurred (2015).
10. Ordering or placing of different materials
having affinity for electrons in a series.
Q.2
.Fill in the
blanks:
1. An ebonite
rod acquires a ………………charge when rubbed with a cat’s skin.
2. Opposite charges …………… each other.
3………………..measures and records the intensity of
seismic waves.
4. The point on surface of earth where a seismic
wave originates is called……..
5. Lightning …………..protects high buildings from the
damage caused by lightning.
6. ……………………….is the innermost layer of earth.
7. ……………is the device used in detecting electric charges.
8. Lightning helps in ………..cycle occurring in
nature.
9. Glass rod acquires……………charge when rubbed with
silk cloth.
10. ………………is the method in which charging is done
with touching the charged body to the object that has to be charged.
Q.3.
Give reasons:
1. One should not take shelter under a tall tree
during lightning.
2. Why lightning conductors are used?
3. Why lightning is often accompanied by thunder?
4. Why do we often feel electric shock on opening
the door of our car / house or when we take off our sweaters at night.
5. Why is it dangerous to carry an umbrella during a
thunderstorm?
6. Why tall buildings are mostly struck upon by
lightning?
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