Two charges $4 μ C$ and $36 μ C$ are placed $60 c m$ apart. At what distance from the larger charge is the electric field intensity is zero?

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Solution

electric field is zero between two changes means at point electric field of both charge same . let $60 - r$ be distance from 36 micro c charge so
$k \times 4 / r^{2} = k \times 36 / (60 - r)^{2}$
$\frac{1}{r^{2}}$ = $\frac{9}{(60 - r)^{2}}$
take sq root both side
$\frac{1}{r}$ = $\frac{3}{(60 - r)}$
60-r=3r
60=4r
r=15
zero field from lager charge is $60 - 15 = 45 c m$

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Two charges 4 μC and 36 μC are placed 60 cm apart. At what distance from the larger charge is the electric field intensity is zero?

electric field is zero between two changes means at point electric field of both charge same . let 60−rbe distance from 36 micro c charge sok×4/r2=k×36/(60−r)21r2=9(60−r)2take sq root both side1r=3(60−r)60-r=3r60=4rr=15zero field from lager charge is 60−15=45cm

Two charges $4 μ C$ and $36 μ C$ are placed $60 c m$ apart. At what distance from the larger charge is the electric field intensity is zero?