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Electrostatics
The medium between the two plates is air or a sheet of some insulator, such a medium is called
capacitor
plug
dielectric
adopter
Author:
rikazzz
Comment
Electrostatics
The force between two bodies having charges 500μC and 100μC separated by a distance of 0.5m in the air is
1800 N
1000 N
2200 N
300 N
Author:
rikazzz
Comment
Electrostatics
The coulomb’s force between the 2 point charges 10µC and 5µC placed at a distance of 150cm is
0.2 N
0.5 N
2 N
10 N
Author:
rikazzz
Comment
Electrostatics
If q
1
 and q
2
 are the magnitudes of two charges, r is the distance between the two charges, k is the constant of proportionality then coulomb’s force F between the two charges is equal to
k(q
1
q
2
)/r
2
k(q
1
q
2
)/r
k(q
1
q
2
) + r
2
k(q
1
q
2
) + r
Author:
rikazzz
Comment
Electrostatics
As per Coulomb’s law, the force of attraction or repulsion between two point charges is directly proportional to the
sum of the magnitude of charges
square of the distance between them
product of the magnitude of charges
cube of the distance
Author:
rikazzz
Comment
Electrostatics
The thunderclouds are charged by friction between
clouds and air
layers of clouds
water molecules and air
layers of air
Author:
rikazzz
Comment
Electrostatics
Coulomb’s law is only true for point charges whose sizes are
medium
very large
very small
large
Author:
rikazzz
Comment
Electrostatics
Due to a large quantity of electric charge which builds up in the heavy thunderclouds, the phenomenon occurs is called
rain
storm
heating
lightning
Author:
rikazzz
Comment
Electrostatics
If mica and woolen cloth are rubbed together, then mica gets
positively charged
negatively charged
remains neutral
dual charged
Author:
rikazzz
Comment
Electrostatics
By using electroscope, if the body is negatively charged then due to electrostatic induction, then on the leaves there will be appear
both positive and negative charges
negative charge
positive charge
no charge
Author:
rikazzz
Comment
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