A circuit element is placed in a closed box. At time \( t=0 \), constant current generator suppl...

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A circuit element is placed in a closed box. At time \( t=0 \), constant current generator supplying a current of \( 1 \mathrm{amp} \), is connected across the box. Potential difference across the box varies according to graph shown in figure. The element in the box is
(a) Resistance of \( 2 \Omega \).
(b) Battery of emf \( 6 \mathrm{~V} \).
(c) Inductance of \( 2 \mathrm{H} \).
(d) Capacitance of \( 0.5 \mathrm{~F} \).
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