Question

The plot represents the flow of current through a wire at three different times. The ratio of charges flowing through the wire at different times is:

• A. 2 : 1 : 2
• B. 1 : 3 : 3
• C. 1 : 1 : 1
• D. 2 : 3 : 4

Answer 1

The correct option is C 1 : 1 : 1

$Charge=areaunderthecurrent-timegraph$
$q_1=2\times 1=2,q_2=1\times 2=2$, and $q_3=\frac{1}{2}\times 2\times 2=2$
$q_1:q_2:q_3=2:2:2=1:1:1$