How do I calculate the magnitude and phase angle using both cosine and sine rules?
Please help! I have spent hours trawling through books and the internet trying to answer this question. I am a first year BTEC student and haven't received any input on how to solve this problem. An electrical circuit is connected to an a.c supply voltage and draws a current from the supply.The circuit has four parallel branches. Each branch has its own current.
The current in branch one i1 has a magnitude of 20A and is in phase with the supply voltage hence it's angle is 0 radians
i2 has a magnitude of 5A ata a phase angle to the reference of 1 radian
i3 has a magnitude of 10A at a phase angle to the reference of 3.14/2 radians
i4 has a magnitude of 10A at a phase angle of 3.785 radians
1)Plot the vectors on a diagram
2)Calculate the magnitude and phase angle, to the reference, of the resultant supply current using both cosine and sine rules as appropriate.
The current in branch one i1 has a magnitude of 20A and is in phase with the supply voltage hence it's angle is 0 radians
i2 has a magnitude of 5A ata a phase angle to the reference of 1 radian
i3 has a magnitude of 10A at a phase angle to the reference of 3.14/2 radians
i4 has a magnitude of 10A at a phase angle of 3.785 radians
1)Plot the vectors on a diagram
2)Calculate the magnitude and phase angle, to the reference, of the resultant supply current using both cosine and sine rules as appropriate.
Replies
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PraveenKumar PurushothamanRe: How do I calculate the magnitude and phase angle using both cosine and sine rules
Could you please post the circuit diagram, as when I tried to draw, I could get some ambiguity... -
venueeeRe: How do I calculate the magnitude and phase angle using both cosine and sine rules
hello first you convert the radians into degrees then your 50% problem will solved. -
narayana murthyRe: How do I calculate the magnitude and phase angle using both cosine and sine rules
hey angle 0 radians do you mean it is 20+j0 or 20@angle0luxfoa01Please help! I have spent hours trawling through books and the internet trying to answer this question. I am a first year BTEC student and haven't received any input on how to solve this problem. An electrical circuit is connected to an a.c supply voltage and draws a current from the supply.The circuit has four parallel branches. Each branch has its own current.
The current in branch one i1 has a magnitude of 20A and is in phase with the supply voltage hence it's angle is 0 radians
i2 has a magnitude of 5A ata a phase angle to the reference of 1 radian
i3 has a magnitude of 10A at a phase angle to the reference of 3.14/2 radians
i4 has a magnitude of 10A at a phase angle of 3.785 radians
1)Plot the vectors on a diagram
2)Calculate the magnitude and phase angle, to the reference, of the resultant supply current using both cosine and sine rules as appropriate.
first give th circuit diagram so that we can give solution
another thing is don't post question in this subsection because it is for videos and class reviews -
praba230890Re: How do I calculate the magnitude and phase angle using both cosine and sine rules
You didn't mentioned the value of 4 resistors, as you said four resistors in parallel u better work on that parallel circuit use the formula 1/r1+1/r2+1/r3+1/r4 to get equiv resistance.narayana murthyhey angle 0 radians do you mean it is 20+j0 or 20@angle0
first give th circuit diagram so that we can give solution
another thing is don't post question in this subsection because it is for videos and class reviews
Now you got a single resistor connected to the load(resistor) if your voltage and resistance values are given use OHM's law.
You are reading an archived discussion.
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