A circuit element is placed in a closed box. A time t = 0, a constant current generator supplying a current of 1 amp is connected across the box. Potential difference. across the box varies according to graph as shown in the figure. The element in the box is -
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Since, on supplying a constant current of 1 A in the circuit element, the potential difference across it is increasing, therefore it should be a capacitor because on supplying the current, the charge as well as the potential will increase. From graph, Charge supplied to the capacitor in 3 s .
A charge of 3 C increases the potential difference across the capacitor through (8 – 
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