d
\(\operatorname{Fiux} \phi=\overline{B} \cdot \overline{A}=\mathbf{B A} \cos \theta=\mathbf{B A} \cos \omega t\)

\(|\) Induced emf \(|=| \mathrm{e}|=| \frac{\mathrm{d} \phi}{\mathrm{dt}}|=| \mathrm{BA} \omega \sin \omega t |\)

le \(|\) will be maximum at \(\omega t=\frac{\pi}{2}\)

\(\left(\frac{2 \pi}{\mathrm{T}}\right) \mathrm{t}=\frac{\pi}{2}\)

\(\left(\frac{2 \pi}{10}\right) \mathrm{t}=\frac{\pi}{2} \Rightarrow \mathrm{t}=2.5 \mathrm{sec}\)

\(|\mathrm{e}|\) will be minimum at \(\omega \mathrm{t}=\pi\)

\(\left(\frac{2 \pi}{10}\right) t=\pi \Rightarrow t=5 \sec\)