Question

SI unit of magnetic induction:
A) Newton.
B) Tesla.
C) Weber.
D) Candela.

Answer 1

Hint: The magnetic induction is a phenomenon in which there is production of current in the circuit because of the changing magnetic field. The magnetic field can be changing or the circuit can change the main criteria is that the magnetic flux changes.

Formula used: The formula of the electromagnetic induction is given by,
$ \Rightarrow B = \dfrac{\phi }{A}$
Where B is electromagnetic induction, the magnetic flux is $\phi $ and area is A.

Complete solution:
In the problem the SI unit of magnetic induction is asked we need to find the correct answer for this problem. The electromagnetic induction helps us to develop the e.m.f which is equal to the rate of change of the magnetic flux with respect to time.
The formula of the electromagnetic induction is given by,
$ \Rightarrow B = \dfrac{\phi }{A}$
Where B is electromagnetic induction, the magnetic flux is $\phi $ and area is A.
Now let us put the units of the physical quantity in the formula of the electromagnetic induction.
The unit of the magnetic flux is Weber (wb) and the unit of area is ${m^2}$. Replace the units in the formula of the magnetic induction.
$ \Rightarrow B = \dfrac{\phi }{A}$
$ \Rightarrow B = \dfrac{{wb}}{{{m^2}}}$
$ \Rightarrow B = wb - {m^2}$
The unit of magnetic induction is equal to $wb - {m^2}$. The unit $wb - {m^2}$ can also be expressed in Tesla. So the unit of magnetic induction is Tesla.

The correct answer for this problem is option B.

Additional information: The force is the product of mass and acceleration and its unit is Newton, the magnetic flux is defined as the magnetic field lines passing through a particular area in the perpendicular direction and its unit is Weber (wb). Intensity is defined as the power per unit area and its unit is candela.

Note: The students are advised to understand and remember the formula of the magnetic induction as it is very important for solving these kinds of problems. The unit of magnetic flux is weber and the unit of the area of cross section is equal to square of meter.