Question

Which of these points may be a null point?

• A. A
• B. B
• C. C
• D. None of these

Answer 1

The correct option is C C

A null point is a point in a field where field is zero as the result of two or more opposite quantities completely cancel each other. From the figure, we can clearly see that at point C, field of two positive point charges is cancelling each other and is zero. So, C is a null point.