Essential Pre-Uni Physics C4a.4
https://isaacphysics.org/questions/phys19_c4a_q4?board=phys19_c4_add&stage=a_level
Struggling with Part C of the question. The answer to part A is 18/7 R and the answer to part B is 2/9V. I solved B by taking the equivalent resistance of the 7 resistors on the right side of the circuit and then just using the ratios between that equivalent resistor and the 2 R’s left. I tried that for C but I’m not getting the right answer. Any help would be appreciated.
Struggling with Part C of the question. The answer to part A is 18/7 R and the answer to part B is 2/9V. I solved B by taking the equivalent resistance of the 7 resistors on the right side of the circuit and then just using the ratios between that equivalent resistor and the 2 R’s left. I tried that for C but I’m not getting the right answer. Any help would be appreciated.
Original post by Joinedup
I'd say you already did the heavy lifting for C in part B
the PD across R2 is half the PD across R1 because the PD across R1 is divided across the 2 identical triangular resistor networks on the right of the diagram
the PD across R2 is half the PD across R1 because the PD across R1 is divided across the 2 identical triangular resistor networks on the right of the diagram
Ahh I see. Thank you very much.
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