Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

Options:

a

b

c

d

Correct Answer:

a

Explanation:

Let electric field is zero at distance x from q1

⇒ $\frac{kq_1}{x^2} = \frac{kq_2}{(20-x)^2}$

⇒ $\frac{4}{x^2} = \frac{9}{(20-x)^2}$

⇒ $\frac{2}{x} = \pm \frac{3}{20-x}$

⇒ 40-2x = $\pm$ 3x 

x = 8 cm from q1