For
A is the amplitude and is the period, can you answer the first two now?
need help with this can you provide any light on it.....
The instantaneous value of current, i amp, at t seconds is given by
i= 15 sin (100 pi t + 0.6)
Find
the amplitude
the period
the frequency
the initial phase angle when t =0 expressed in both radians and degrees
the value of i when t=2.5
the time in milliseconds when the current first reaches its maximum value
I need all the help I can get thanks
Amplitude ---- 15
Period ---- 2 pi / 100 pi = 1/50
Frequency ---- F=1 / (1/50) = 50Hz
Phase Angle ---- 0.6 rad = (0.6 x (180/pi)) = 34.38deg or 34o 23' leading
I ----15 sin (100 pi 2.5 + 0.6) = 15 sin (786) = 15 x 0.9063 = 13.59Amps
Time ---- 15 = 15 sin (100 pi t + 0.6)
arcsin 15 / 15 = ( 100 pi t + 0.6)
90o or 1.5708rad
100 pi t = 1.5708 - 0.6
t = 0.9708 / 100 pi
t = 0.0031
= 3.1 ms
Am I way off the mark here can someone advise please?