What's inside the Book puzzle box? #shorts

Careful measurement of the electric field at the surface of a black box inidicates that the net outward flux through the surface of the box is 8.0xx10^(3) Nm^(2)//C (a) what is the net charge inside the box ? (b) If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box ? Why or why not?

What is the cost of Gear Box ?

Careful measurements of the electric field at the surface of a box inidcates that the net outward flux through the surface of box is 60xx10^(3) Nm^(2) C^(-1) . Find (i) the net charge inside the box ? (ii) If the net outward flux through the surface of box were zero, could you conclude that there were no charges inside the box ? Explain your answer.

Consider the 3 -puzzle problem shown in figure.

Intensity of magnetic field due to earth at a point inside a hollow steel box is

A solid ball is exactly fitted inside the cubical box of side a . The volume of the ball is .

Determine the missing value in the puzzle below :