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Q1
The potential difference across a circuit is given by the complex number
If V= 40 + j35,
and the current is given by the complex number
I = 6 + j3
a) Sketch appropriate phasors on an argand diagram,
b) Find the phase difference (angle Φ ) between the phasors for voltage V and current I
c) Find power (watt) = V × I × cos (Φ)
Q2
i = 15 sin (100Πt + 0.6)
What is the amplitude, period, frequency.
Whats the initial phase angle when t = 0 expressed in both radians and degrees.
The value of e when t = 2.5 sec the Time in miliseconds when the current first reaches its maximum value.
Verified Expert
Question 1 is asked to draw phasor diagrams for two phasors Voltage and Current. From the given data and diagram drawn for it we can say that magnitude of voltage(53.15 V) is greater than the magnitude of current(6.708amp). Actually question 2 is given in sine wave form of current. Since amplitude is highest value of the current. This value depends on the maximum value of sine which is 1. So max. value of current is 15. Thus amplitude is 15. Sine repeats its value after 360 degree or 2pie radian.
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