Question

A capacitor is charged using an external battery with a resistance x in series. The dashed line showns the variation of In I with respect to time. If the resistance is changed to 2x, the new graph will be

A. P
B. Q
C. R
D. S

Answer 1

Correct Answer - B
(b) `I = (epsilon)/(R ) e^(-t//RC)`
`log_(e) I = log_(e) (epsilon)/(R ) - (t)/(RC) log_(e) e implies 1n I = 1n ((epsilon)/(R )) = (t)/(RC)`
Slope `= - (t)/(RC) y` intercept `= 1n((epsilo)/(r ))`
If resistance is made doubled, both of the above decrease in magnetude.