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'

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

answer and explanation;

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.