Question

Gauss is a unit of which quantity?
A- H
B- B
C- \[\varphi \]
D- I

Answer 1

Hint: Gauss as the name suggests is named after great scientist Carl Friedrich Gauss, and Gauss law is a very important law in physics in the field of electricity and magnetism. Gauss in a unit which is evidently used in the field of electricity and magnetism.

Complete step by step answer:
We need to tell about which quantity has units of Gauss. We are given four options and the fourth option is the option (D) which stands for electric current and we know that electric current is measured in units of Amperes (A). so, this option is also incorrect.
The third option that is option (C) represents magnetic flux and it is measured in units of Weber. So, this option is also not correct.
Now see the second option (B) which stands for Magnetic flux density. As the name suggests it is the density of magnetic flux over a certain area or a volume. Flux is a dot product of a magnetic field with the area vector. The gauss is the unit of magnetic flux density B in the system of nonstandard units.

So, the correct answer is “Option B”.

Note:
\[\varphi \] is a Greek symbol and it does not necessarily represent magnetic flux everywhere. \[\varphi \] is used in different places in physics, mathematics and in chemistry too, so, we have to see the context where it is used. Here, out of all the four options the magnetic flux which has units of gauss is represented by \[\varphi \]