Answer:
[tex] 1.04\times 10^{-7}[/tex] T
Explanation:
[tex]IP[/tex] = Power of the bulb = 100 W
[tex]r[/tex] = distance from the bulb = 2.5 m
[tex]I[/tex] = Intensity of light at the location
Intensity of the light at the location is given as
[tex]I = \frac{P}{4\pi r^{2}}[/tex]
[tex]I = \frac{100}{4(3.14) (2.5)^{2}}[/tex]
[tex]I[/tex] = 1.28 W/m²
[tex]B_{o}[/tex] = maximum magnetic field
Intensity is given as
[tex]I = \frac{B_{o}^{2}c}{2\mu _{o}}[/tex]
[tex]1.28 = \frac{B_{o}^{2}(3\times 10^{8})}{2(12.56\times 10^{-7})}[/tex]
[tex]B_{o} = 1.04\times 10^{-7}[/tex] T
