2010014702 | math4u.vsb.cz

SubArea:

Applications of definite integral

Level:

Project ID:

2010014702

Source Problem:

Accepted:

0

Clonable:

1

Easy:

0

The time characteristic of an alternating voltage

u

is given in the figure, where

U_{m}

is the peak value of

u

. Find the effective value

U

of the alternating voltage

u

provided the following relation holds:

U^{2} T = \int_{0}^{T} u^{2} d t

.

U = \frac{\sqrt{3}}{3} U_{m}

U = \frac{\sqrt{2}}{2} U_{m}

U = \frac{1}{3} U_{m}

U = \frac{1}{2} U_{m}