Physics (AS & A Level) · Oct / Nov 2017 · Paper 12 · Question 34
9702Kirchhoff’s laws
A cell of negligible internal resistance is connected to resistors R$_1$, R$_2$ and R$_3$, as shown. The cell provides power to the circuit and power is dissipated in the resistors. Which word equation must be correct?
- Apower loss in R$_1$ = power loss in R$_2$ + power loss in R$_3$
- Bpower loss in R$_2$ = power loss in R$_3$
- Cpower output of cell = power loss in R$_1$ + power loss in R$_2$ + power loss in R$_3$
- Dpower output of cell = power loss in R$_1$
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Correct answer: C. power output of cell = power loss in R$_1$ + power loss in R$_2$ + power loss in R$_3$
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