**Show all work and equations used, provide diagrams if needed
Given,
Charge on particle 1 ()
is -2 n C i.e. -2 x 10-9 C
charge on particle 2 ()
is -1 x 10-9 C
charge on particle 3 ()
is 3 x 10-9 C
From this diagram we can calculate the vectors
,
, and
. Here, A , B , C , and O is the position of particle 1 , 2 , 3 ,
and the electron respectively.
and
(Position vector of a point is defined as the vector starting from the origin and ending to the point. )
Similarly ,
So,
So,
(a)
Electric field due to a charged particle having charge ' q ' at a distance ' r ' is given by
in vector notation
or,
Where,
Using this equation we can calculate the electric field due to all the three particles at O.
So, Electric field at O due to particle at A will be
Electric field at O due to particle at B will be
Electric field at O due to particle at C will be
So, net electric field at point O due to all the three particles is
So, the magnitude of net electric field is
And the direction
is
Hence, the net electric field is making an angle of 12.740 (or nearly 130) with the x - axis.
(b)
Electric potential due to a charged particle having charge ' q ' at a distance ' r ' is given by
Where,
Using this equation we can calculate the electric potential due to all the three particles at O.
So, Electric potential at O due to particle at A will be
Electric potential at O due to particle at B will be
Electric potential at O due to particle at C will be
So, net electric potential at point O due to all the three particles is
(c) The force on a charge particle (having charge ' q ') in electrostatic field ' E ' is given by
So, the force on electron ( charge on electron = -1.602 x 10-19 C) at the point O will be
The magnitude of force is
And the direction of the force will be in the opposite direction of electric field because electron has negative charge.
(d) The work done in bringing the electron from infinity to the point O will be
(potential at infinity is zero)
or,
For any doubt please comment and please give an up vote. Thank you.
**Show all work and equations used, provide diagrams if needed o Show enough work to guide...
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