Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

Solve the question in photo showing each step clearly
question image
Asked by Vidushi412 | 11 Apr, 2019, 08:07: AM
answered-by-expert Expert Answer
we know, by coulombs law,  electrostatic force between charges is proportional to product of charges.
In the question, distance is kept constant as L for all charge configuration.
Hence we can consider the force between charges is some constant  multiple of  product of charges 
 
hence we have,    ( q1 + q2 )×q3 = 2          ...................(1)
                             ( q2 + q3 )×q1 = -4         ...................(2)
                             ( q3 + q1 )×q2 = -18      ...................(3)
 
eqn.(1) is rewritten as ,  q1 q3 + q2 q3 = 2   ........................(4)
eqn.(4) is rewritten as,   q1 q3 + q2 q1 = -4  ........................(5)
 
eqn(4) - eqn(5)  gives,    q2 q3 - q2 q1   =  6  .........................(6),
eqn.(3) is written as,      q2q3 + q2q1  = -18 .......................(7)
 
By solving eqn.(6) and (7),  we get   q2 q3 = -6  and  q2q1 = -12  .
 
By dividing these products of charges, we get  q1 / q3 = 2  .........................(8)
 
By substituting ( q2 q3 ) in eqn.(4), we get  q1 q3 = 8  .....................(9)
 
from eqn.(8) and eqn.(9) , we get q1 = 4  and q3 = 2 ,  if q2 q3 = -6 , then q2 = -3
 
hence q1 : q2 : q3 = 4 : -3 : 2
Answered by Thiyagarajan K | 11 Apr, 2019, 10:41: AM

Application Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Physics
find current
question image
Asked by arivaryakashyap | 23 Apr, 2024, 10:40: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
Three equal charges, 2⋅0 × 10 − 6 C each, are held fixed at the three corners of an equilateral triangle of side 5 cm. Find the Coulomb force experienced by one of the charges due to the rest two.
question image
Asked by ratnadeep.dmr003 | 21 Apr, 2024, 11:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
Time period for a simple harmonic motion (d ^ 2 * x)/(d * t ^ 2) =- mu xis:
Asked by ksahu8511 | 19 Apr, 2024, 11:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
find the acceleration
question image
Asked by mohammedimroz | 13 Apr, 2024, 09:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
solution of 12th question
question image
Asked by medhamahesh007 | 02 Apr, 2024, 11:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
if Bi with a mass number 211 and atomic number 83 undergoes beta decay the resultant daughter nuclei will be
Asked by gundlasumathi93 | 31 Mar, 2024, 02:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
four charges are arranged at corners of square abcd as in figur the force on charge kept at centre o is
question image
Asked by chhayasharma9494 | 31 Mar, 2024, 12:47: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
two small conducting spheres each of mass 9×10‐⁴kg qre suspended from the same point by non conducting strings of length 100cm. they are given equal and similar charges until the strings are rqually inclined at 45° each to the vertcal. The charge on each sphere is
Asked by archithateja3 | 30 Mar, 2024, 10:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
how to draw straight line graph and how to identify y-intercept and slope
Asked by Machinenineha | 27 Mar, 2024, 05:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
Help me
question image
Asked by nandichandi33 | 24 Mar, 2024, 09:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×