The unit of magnetic flux is

Calculate the magnetic flux through the triangular loop shown in the figure. $A$ uniform magnetic field of strength $2 \text{ T}$ points perpendicularly into the plane of the triangle.

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

The net magnetic flux through any closed surface is

Given below are two statements $:$ one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A) :$ Magnetic monopoles do not exist.
Reason $(R) :$ Magnetic field lines are continuous and form closed loops.
In the light of the above statements, choose the most appropriate answer from the options given below.

$A$ coil is placed in a magnetic field such that the plane of the coil is perpendicular to the direction of the magnetic field. The magnetic flux $\phi$ through the coil can be changed by:
$(A)$ Changing the magnitude of the magnetic field $B$.
$(B)$ Changing the area of the coil $A$.
$(C)$ Changing the angle $\theta$ between the magnetic field and the plane of the coil.
$(D)$ Reversing the direction of the magnetic field.