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If in a region there is a time varying electric field then
\( \mathrm{P} \) which of the following Maxwell's equation will be
\( \mathrm{W} \) most suitable?
(1) \( \oint \vec{B} \cdot \overrightarrow{d l}=I+\varepsilon_{0} \frac{d \phi_{E}}{d t} \)
(2) \( \oint \vec{B} \cdot \overrightarrow{d l}=\mu_{0} I \)
(3) \( \oint \vec{B} \cdot \overrightarrow{d l}=\mu_{0}\left[I+\varepsilon_{0} \frac{d \phi_{E}}{d t}\right] \)
(4) \( \oint \vec{B} \cdot \overrightarrow{d l}=\mu_{0}\left[I+\varepsilon_{0} \frac{d \phi_{B}}{d t}\right] \)
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