1. What is the force between q1 and q2 , if q3 is absent?

Question

q₁ , q₂ and q₃ are three point charges located in free space 

1. What is the force between q₁ and q₂ , if q₃ is absent?

2. What is the force between q₁ and q₂ if q₃ is present?

3. State the principle used to find total force on q₁ and calculate total force F₁ on q₁ 

4. Draw the vector diagram representing individual forces and total force on q₁ .

Answer 1

1. F = \(\frac{1}{4\pi \varepsilon_0}\frac{q_1q_2}{r^2_{12}}\)

2. F = \(\frac{1}{4\pi \varepsilon_0}\frac{q_1q_2}{r^2_{12}}\)

3. Total force on q₁ can be found using super position principle ie.

Where r₁₂ is the distance between q₁ and q₂ and r₁₃ is the force between q₁ and q₃