Solveeit Logo

Question

Question: Gauss is the unit of? A- B B- H C- M D- I...

Gauss is the unit of?
A- B
B- H
C- M
D- I

Explanation

Solution

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. A unit of measurement is a definite magnitude of a quantity and defined by law and is used as a standard for measurement of the same kind of quantity everywhere in the world.

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 I 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 second option is H, which is magnetic field strength and the third option is M, we know that H and M both will have the same units, amperes/meter. So, the option (B) and (C) are incorrect.
Now see the second option is B which stands for Magnetic flux density and we know it is defined as the force acting per unit current per unit length on a wire placed at right angles to the magnetic field. The gauss is the unit of magnetic flux density B in the system of Gaussian units.
So, the correct option is (B).

Note: The unit for the magnetic field strength H can be derived from its relationship to the magnetic field and it comes out to be A/m. Another unit for magnetic field strength is the oersted and the relationship between the two is 1 A/m = 0.01257 oersted.