The alternating current in a circuit is described by the graph shown in the figure. Show the RMS current in this graph.

                                        

Hint: We can find the RMS value of the current from the graph.
Step 1:
Irms=rms current
      =12+222=52=1.58A1.6A
Step 2: The rms value of the current, (Irms)=1.6A is indicated in the graph.