54 ELECTRICAL ENGINEERING PROBLEMS 



and obtain the ratio of this to the average value. Compare this 

 with the same ratio for the sine wave. (10 min.) 



13. Find the effective value of the wave form e = 100 sin a. + 

 20 sin (3 a 30) as constructed in problem 11, and obtain its 

 ratio to the average value of the same curve. (15 min.) 



