Question

A circuit element is placed in a closed box. At time t=0, costant current genertor supplying a current of 1 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 `2Omega`
B. battery of emf `6V`
C. inductance of `2H`
D. capacitance of `0.5F`

Answer 1

Correct Answer - D
`q=CV implies V=1/Cq`
`(dV)/(dt)=1/C(dq)/(dt)`
`int dV=i/C int dt implies V=i/Ct+K`
`8=1/Cxx3+2 implies C=0.5F`