Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

What is the flux through each face of a cube when a point charge q is placed at one of the vertices of the cube of edge length a?

Options:

(1/8)q/ε0

(1/24)q/ε0

(1/16)q/ε0

(1/4)q/ε0

Correct Answer:

(1/24)q/ε0

Explanation:

Flux through cube due to charge at corners will be q/8ε0. Cube has 6 faces with 3 symmetrical and 3 having zero flux (as field will be parallel to them). As 8 X 3=24, so q/24ε0