15 1 st Session 2002:
Mains
The graph below represents the variations,
as a function of time, of the voltage across
the terminals of a generator.
Take (V2 = 1.4).
The oscilloscope is adjusted as follows:
Horizontal sensitivity Sh
= 5 ms/ div.
Vertical sensitivity Sy
= 5 V / div.
B
А
D
С
E
F
a. Is the voltage :
• direct or alternating ?
triangular or sinusoidal ?
b. Specify a point on the graph that may be
used to determine the maximum value U
of the voltage. Calculate Um
m
m'