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Physics question. How to do part b (i )&(ii)
Date Posted: 7 years ago
Views: 652
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done
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Utilise the V=IR and Q=IT formula.
Date Posted:
7 years ago
Thanks. So to find the resistance of X, is it
I= 0.5-0.3333=0.167
R=1/0.167
Like this? Why we use the voltage of 1V, and not 2V(given by the battery)
I= 0.5-0.3333=0.167
R=1/0.167
Like this? Why we use the voltage of 1V, and not 2V(given by the battery)
The voltage across both the 3ohm resistor and X is 1.0V, not the 2.0V across the battery. There has already been a 1.0v p.d drop across the 2.0ohm resistor, hence the the remaining potential drop across both the 3ohm resistor and X must be 1.0V as explained in the workings. The p.d across X and the 3.0ohm resistor must be the same at 1.0V as they are placed in parallel with one another.
Got it! Thanks so much.
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