Question

You are given following current - time graph from two different sources:
I. Name the type of current in two cases.
II. Identify any one source for each type of these currents.
III. What is the frequency of current in case II in India?
IV. Use above graphs to write two difference between the current in two cases.

Answer 1

$\left(i\right)$ First graph is $DC$ current source since direction of current doesn't change and second graph is $AC$ current their direction change with respect to time.

$\left(ii\right)$ $DC$ source is battery and $AC$ source is $AC$ generator.

$\left(iii\right)$ Frequency of $AC$ in India$=50Hz$

$\left(iv\right)$ $\left(a\right)$ $DC$ value is constant but $AC$ value is varies with respect to time.

$\left(b\right)$ Direction of current not changes but in $AC$ direction changes from negative to positive.