Three charged particles A,B and C with charges – 4q, 2q and -2q are present on the circumference of a circle of radius d. The charged particles A,C and centre O of the circle formed an equilateral triangle as shown in figure, Electric field at O along x-direction is:
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a
23qπε0d2
b
3qπε0d2
c
33q4πε0d2
d
3q4πε0d2
answer is B.
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Detailed Solution
Electric field due to B and C is along OC andElectric field due to A is along OAAs per figure, the net horizontal component of electric field isEnet=4kqd2×2cos300=q3πε0d2
Three charged particles A,B and C with charges – 4q, 2q and -2q are present on the circumference of a circle of radius d. The charged particles A,C and centre O of the circle formed an equilateral triangle as shown in figure, Electric field at O along x-direction is: