The figure shows a non conducting ring which has positive and negative charge non uniformly distributed on it such that the total charge is zero. Which of the following statements is false?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

The potential at all the points on the axis will be zero

The electric field at all the points on the axis will be zero

The direction of electric field at all points on the axis will be along the axis

If the ring is placed inside a uniform external electric field then net torque and force acting on the ring would be zero

answer is B, C, D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The potential at any axial point of ring is $V = K \frac{Q}{\sqrt{x^{2} + R^{2}}}$

As the total charge (Q) is zero and potential is a scalar quantity. thus the potential at all points on the axis will be zero.
But the electric filed is a vector quantity and here some component of electric field is non zero on the axis and its resultant in direction along perpendicular direction to the axis.
As the electric field is not uniform so net force will not zero. As E is not zero so here torque will not zero.

Watch 3-min video & get full concept clarity