Eric Nicholas K's answer to genevieve's Secondary 4 A Maths Singapore question.
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The circuit which is presented in the question can be redrawn into my version. It does not matter whether they are connected in a triangle manner or not. They key connection between the two ends remain the same, so we simplify the diagram by drawing your familiar rectangular shaped diagrams.
Let me know if you need more explanation, because I know it's quite complicated.
Let me know if you need more explanation, because I know it's quite complicated.
Date Posted:
4 years ago
Good evening Cheryl! You can do a direct transition from my second diagram to my third diagram for simplicity before you look at my workings on the second line. The two diagrams are equivalent diagrams.
The approach that I undertook for my question is this.
1. Attempt to find current flowing through the circuit when the switch is OPEN
2. Attempt to evaluate the EMF of tbe battery, which is the only thing unchanged in the circuit in BOTH scenarios
3. Attempt to find current flowing through the circuit when the switch is CLOSED
4. Find out how much of this current goes to each branch of the PARALLEL component of the circuit
5. Obtain the value of R
1. Attempt to find current flowing through the circuit when the switch is OPEN
2. Attempt to evaluate the EMF of tbe battery, which is the only thing unchanged in the circuit in BOTH scenarios
3. Attempt to find current flowing through the circuit when the switch is CLOSED
4. Find out how much of this current goes to each branch of the PARALLEL component of the circuit
5. Obtain the value of R
thanks!
I also drew the current direction wrongly.
I update this now.
I update this now.
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