Answer:
The strength of magnetic field is 0.2 Tesla.
Explanation:
Data from the question is
Length (L) of wire ; L=0.10 m
Current in wire ; I= 2.0 A
Force on wire ; F = 0.04 N
Angle = Right angle So, ![\theta](https://tex.z-dn.net/?f=%5Ctheta)
![\thita = 90^{o}](https://tex.z-dn.net/?f=%5Cthita%20%3D%2090%5E%7Bo%7D)
Now ,
We have to find the magnetic Field strength (B)
For this formula for Force on wire in magnetic field is
![F = I \times B \times L \times sin(\theta)](https://tex.z-dn.net/?f=F%20%3D%20I%20%5Ctimes%20B%20%5Ctimes%20L%20%5Ctimes%20sin%28%5Ctheta%29)
Further modified as
![B = \frac{F}{I \times L \times sin(\theta)}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7BF%7D%7BI%20%5Ctimes%20L%20%5Ctimes%20sin%28%5Ctheta%29%7D)
Now insert values in the formula
![B = \frac{0.04N}{2.0A \times 0.10 m \times sin(90^{0})}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B0.04N%7D%7B2.0A%20%5Ctimes%200.10%20m%20%5Ctimes%20sin%2890%5E%7B0%7D%29%7D)
![B = 0.2 T](https://tex.z-dn.net/?f=B%20%3D%200.2%20T)
So, the strength of magnetic field is 0.2 Tesla.