SATHEE: Electrostatics Question 678

Electrostatics Question 678

Question: Two charge q and -3q are placed fixed on x-axis separated by distance d. Where should experience any force?

Options:

A) $\frac{d - \sqrt{2} d}{2}$

B) $\frac{d + \sqrt{3} d}{2}$

C) $\frac{d + 3 d}{2}$

D) $\frac{d - \sqrt{5} d}{2}$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Let a charge 2q be placed at P, at a distance I from A where charge q is placed, .

The charge 2q will not experience any force, when force, when force of repulsion on it due to q is balanced by force of attraction on it due to - 3q at B where $A B = d$

or $\frac{(2 q) (q)}{4 π ε_{0} ℓ^{2}} = \frac{(2 q) (- 3 q)}{4 π ε_{0} {(ℓ + d)}^{2}}$

$= 11 μ C .$

$∴ ℓ = \frac{2 d \pm \sqrt{4 d^{2} + 2 d^{2}}}{4} = \frac{d}{2} \pm \frac{\sqrt{3} d}{2}$

Electrostatics Question 678

Question: Two charge q and -3q are placed fixed on x-axis separated by distance d. Where should experience any force?

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Electrostatics Question 678

Question: Two charge q and -3q are placed fixed on x-axis separated by distance d. Where should experience any force?

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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