Question

The linear charge density on upper half of segment of ring is $\lambda $ and at lower half it is $-\lambda $ . The direction of electric field at centre $O$ of ring is

• A. along $OA$
• B. along $OB$
• C. along $OC$
• D. along $OD$

Answer 1

Answer: (C)

Given
The linear charge density on upper half of segment of ring is $\lambda $ and at lower half it is $-\lambda $ .
The direction of electric field at centre $O$ of ring can be calculated as

Directions of electric field due to upper half and lower half will be as shown