Question

A circular ring of radius r made of a non-conducting material is placed with its axis parallel to a uniform electric field. The ring is rotated about a diameter through 180°. Does the flux of the electric field change? If yes, does it decrease or increase?

Answer 1

No, the flux will not change. It will remain the same.

Explanation:

• The circular ring is made up of a non-conducting material. It has the radius r. The ring is placed in a uniform electric field with its axis parallel.
• This shows that both the area vector and the electric field are parallel to each other. It is also to be noted that to the surface area, the area vector is perpendicular always. So, the flux is shown as E→.S→= ES cos 0 = E(πr2).
• So, when there is rotation of the ring through 1800 about its diameter, the angle between the electric field and the area vector becomes 1800. So, the flux becomes -E(πr2).

Answer 2

Hope answer was helpful to you