Electric Flux
A uniform electric field of magnitude 350 N/C is directed along the +y-axis. A rectangular surface of dimensions 0.40 m × 0.50 m has its area vector oriented along the +y-axis. Calculate the electric flux through the surface.
A flat circular disk of radius 0.25 m is placed in a uniform electric field of 600 N/C. The area vector of the disk makes an angle of 45° with the electric field. What is the electric flux through the disk?
A surface is placed in a region of uniform electric field. A student measures the angle between the electric field and the plane of the surface to be 25°. What is the correct angle θ to use in the flux formula $\Phi_{\mathrm{E}}$ = EA cos θ?
A uniform electric field of magnitude 200 N/C is directed in the +x-direction. A cube of side length 0.50 m is placed in this field with its faces aligned with the coordinate axes. No charge is enclosed. What is the net electric flux through the entire closed surface of the cube?
An engineer needs to maximize the electric flux through a flat sensor of fixed area placed in a uniform electric field. Which orientation of the sensor achieves this?
Which of the following correctly states the SI unit of electric flux?
A flat surface of area 0.12 m² is in a uniform electric field of 800 N/C. The flux through the surface is measured to be 48.0 N·m²/C. What is the angle between the electric field and the area vector?
A nonuniform electric field in a region is given by E⃗ = cx²î, where c is a positive constant. A cube of side length L has one face at x = 0 and the opposite face at x = L. What is the net electric flux through the entire cube?
A uniform electric field passes through a closed spherical surface. No charges exist inside the sphere. A student claims the flux through the top hemisphere alone must be zero because the total flux is zero. Is this claim correct?
A square surface of side length 0.60 m is placed in a uniform electric field of 1000 N/C. The surface is oriented so that the electric field lies entirely in the plane of the surface. What is the electric flux through the surface?
A researcher doubles the electric field strength in a region and simultaneously halves the area of the flat sensor placed in it, keeping the orientation the same. How does the electric flux through the sensor change?
A uniform electric field of 250 N/C is directed in the +z-direction. A closed cylinder of radius 0.10 m and height 0.30 m has its axis aligned along the z-axis. Calculate the electric flux through the top circular face of the cylinder.
An electric field in a region points radially outward from a central point. A closed spherical surface is centered on this point. Which statement about the electric flux through the sphere is correct?
A dust particle carrying charge drifts into a closed cubic box. Before the particle entered, the net flux through the box was zero. After the charged particle is fully inside the box, a student observes that the net flux is now +5.65 N·m²/C. Which conclusion is best supported?
A uniform electric field of magnitude 750 N/C passes through a flat triangular surface with a base of 0.40 m and a height of 0.30 m. The area vector of the triangle is antiparallel to the electric field. Calculate the electric flux through the triangle.
During a laboratory exercise, a student places a flat circular loop of radius R in a uniform electric field E and measures a flux of Φ₀. Without changing the field, the student replaces the loop with one of radius 3R at the same orientation. What is the new flux?