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the potential difference across a circuit is given by the complex number
V = 40 + j35 volts
& the current is given by the complex number
I = 6 + j3 amps
1) Sketch the appropriate phasors on an Argand diagram
2) Find the phase difference (the angle) between the phasors for Voltage V and Current I
3) Find the power, watt, given power = |V| x |I| x cos(angle)
dont know where to begin for these questions please help me
is this simplier than it looks or im I over thinking itt?
1) Plot the two complex numbers on an Argand graph
2) Use trig ratios to work out V & I & subtract two figures to give the difference in angle
3)Subsitute in above values into equations and work out?
Can someone please tell me if this is right??????
can anyone help here please...
Hello, I'm just doing this question for my HNC
I think you need to convert each rectangular number (i.e 40 + j35 and 6 + j3) into polar form using r=√(a2+b2) and arctan(b/a). The difference between the angles you find is the phase difference
For the power part just enter the polar values for V and I found above and for Cos use the of the value of the angle for the phase difference, also found above
If anyone could confirm this that would be good as I am no expert!!