Magnetic flux through a coil of resistance $10 \Omega$ is changed by $\Delta \phi$ in $0.1 \mathrm{~s}$. The resulting current in the coil varies with time as shown in the figure. Then $|\Delta \phi|$ is equal to (in weber)

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Aicharya · Accepted Answer

$ 	ext { As } \begin{aligned} e=\frac{\Delta \phi}{\Delta t} & 	ext { or } R i=\frac{\Delta \phi}{\Delta t} \quad(\because e=R i) \ \Rightarrow \quad \Delta \phi & =R(i . \Delta t) \ & =R 	imes 	ext { area under } i-t 	ext { graph } \ = & 10 	imes \frac{1}{2} 	imes 4 	imes 0.1=2 	ext { weber } \end{aligned} $

Magnetic flux through a coil of resistance $10 \Omega$ is changed by $\Delta \phi$ in $0.1 \mathrm{~s}$. The…

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