In which of the following systems of units is $Weber$ the unit of magnetic flux?

The unit of magnetic flux is

Explain the concept of magnetic flux.

Imagine rolling a sheet of paper into a cylinder and placing a bar magnet near its end as shown in the figure. What can you say about the sign of $\vec B \cdot d\vec A$ for every area element $d\vec A$ on the surface of the cylinder?

What is the difference between Gauss's law in electrostatics and Gauss's law in magnetism?

Consider the following figure. $A$ uniform magnetic field of $0.2 \, T$ is directed along the positive $X$-axis. The magnetic flux through the top surface of the figure is ....... $m-Wb$.