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Electric charge and fields
CBSE Class 12 Physics || Electric Charges and Fields Part -1 ||
Full Chapter ||
Best for NEET
When, a comb was rubbed against dry hair
...
Objects that carry an electric charge are said to be
electrically charged
...
Electric charge can be defined as
the property that exhibits its electrostatic interaction with other matter
...
AN instrument called a goldleaf
...
IT consists of an insulated
metal rod with two gold leaves or voids at one end and a metal disc at the
other end
...
There is no change observed in the position of the gold
leaves
...
IF gold
leaves fall back to their original position
...
Property of electric charges is that the
total charge in an isolated system is always conserved
...
This property is
called quantization of charge
...
A neutron breaks into a proton and an electron
releasing a neutrino
...
The concept of quantization of charge can be
ignored since it has no practical significance
...
to the power of minus six
...
The process of charging by
bringing a charged body in contact with the neutral body is called charging
by conduction
...
Both bodies involved in this method acquire the same type of
charge
...
The third method to charge a body
is induction of charge
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two charged particles
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THe static
sphere is first given a charge Q by bringing a charged object in contact
with it
...
Then the charged static sphere loses half of its charge that is Q by
two to the other sphere
...
According to Coulomb 's law, the electrostatic force between two
charges is proportional to Q 1 into Q 2
...
The charge on the spheres
decreases the force of repulsion between them also decreases from these
experiments with charged spheres at constant distances
...
In such a system, we first
calculate the electro-static force on that charge by each and every other
charge of the system
...
In the configuration
...
Net electrostatic force on Q 1 is F 1 is equal to 1 by 4 pie
epsilon-not into
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Net force F1 on q1 due to the other charges in the system can be
calculated using F 1, 2, F-1, 3 F 1 n in principle of superposition
...
THe gravitational force between them is equal to five hundred and fifty-two
point three four into ten power minus seventy-three Newton
...
WE can use Coulomb 's
law to calculate the force on Q not due to charge Q
...
Q which is a region in
which the influence of the charge is felt
...
There is a spherical symmetry with respect to the magnitude of
electric field strength E in the field of charge
...
air or a vacuum with
position vectors R 1, R 2, R 3 and so on relative to the origin
...
An
exhilarating charged particle is a source of electromagnetic waves
...
Kriti Ranjan
kritikranjan0000@gmail