Trig: Voltage in an eletrical circuit is given by e=5/20pi t

[laila886]

Can't figure this out to save my life!

Voltage in an eletrical circuit is given by e = 5/20pi t -where t is measured in seconds.

1) What is the amplitude?

Frequency(# of cycles/periods in one second)?

2) Find E when t = 0.12sec

 

[stapel]

Your formatting is ambiguous. Is the function any of the following?

. . . . .e = (5/20) pi t

. . . . .e = [5 / (20pi)] t

. . . . .e = 5 / (20 pi t)

Is there any particular reason why the 5/20 has not been simplified to 1/4?

1) How does amplitude relate to voltage? (I can do the math, but I don't know the electrical-engineering stuff, is why I ask.)

2) You are given that "e" stands for "voltage". But what does "E" stand for, and how does it relate?

Thank you.

Eliz.

 

[skeeter]

missing a trig function, too ... maybe like e = 5sin(20pi*t) ???