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A charge -q1 is kept at a distance y from the origin on Y-axis and another charge -q2 is kept at a distance x from the origin on X-axis. The value of x for the x-component of the force on q1 to be maximum is1) x = y/22) x =y/√23) x= y4) x= √2y
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A charge -q1 is kept at a distance y from the origin on Y-axis and ano...
Problem: Find the value of x for the x-component of the force on q1 to be maximum when a charge -q1 is kept at a distance y from the origin on Y-axis and another charge -q2 is kept at a distance x from the origin on X-axis.

Solution:
To find the value of x for the x-component of the force on q1 to be maximum, we need to find the expression for the force acting on q1, and then differentiate it with respect to x to find the value of x that maximizes the force.

Let us consider the charges -q1 and -q2 at their respective positions as shown in the figure below:



From Coulomb's law, the force F1 on charge q1 due to charge q2 is given by:

F1 = kq1q2 / r^2

where k is the Coulomb constant, r is the distance between the charges, and q1 and q2 are the magnitudes of the charges.

In our case, r is given by:

r = √(x^2 + y^2)

The x-component of the force F1 is given by:

Fx1 = F1 cosθ

where θ is the angle between the force vector and the x-axis.

To find θ, we draw a line from q1 to q2 and extend it to meet the x-axis at point P as shown in the figure below:



From the figure, we can see that:

tanθ = y / x

Therefore,

cosθ = x / r

Substituting the value of r and cosθ in the expression for Fx1, we get:

Fx1 = kq1q2x / (x^2 + y^2)^(3/2)

To find the value of x that maximizes Fx1, we differentiate Fx1 with respect to x and equate it to zero:

dFx1/dx = kq1q2[(x^2 + y^2)^(3/2) - 3x^2(x^2 + y^2)^(1/2)] / (x^2 + y^2)^3 = 0

Solving for x, we get:

x = y / √2

Therefore, the value of x for the x-component of the force on q1 to be maximum is x = y / √2.

Answer: x = y / √2.
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A charge -q1 is kept at a distance y from the origin on Y-axis and another charge -q2 is kept at a distance x from the origin on X-axis. The value of x for the x-component of the force on q1 to be maximum is1) x = y/22) x =y/√23) x= y4) x= √2y
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