Answer:3.77 T/s
Explanation:
Given
Area of cross-section[tex]=3.7\times 3.7 cm^2=13.69 cm^2[/tex]
N=no of turns=61
Resistance=[tex]R=8 \Omega [/tex]
current (i)=0.04 A
emf induced[tex]=i\times R=0.04\times 8=0.32 V[/tex]
emf induced [tex]e=NA\frac{\mathrm{d} B}{\mathrm{d} t}[/tex]
[tex]0.32=62\times 13.69\times 10^{-4}\times \frac{\mathrm{d} B}{\mathrm{d} t}[/tex]
[tex]\frac{\mathrm{d} B}{\mathrm{d} t}=\frac{0.32\times 10^4}{848.78}=3.77 T/s[/tex]
