| Date | May 2014 | Marks available | 1 | Reference code | 14M.1.SL.TZ1.17 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 17 | Adapted from | N/A |
Question
Two resistors of resistance 10 Ω and 20 Ω are connected in parallel to a cell of negligible internal resistance.
The energy dissipated in the 10 Ω resistor in one second is Q. What is the energy dissipated in one second in the 20 Ω resistor?
A. \(\frac{Q}{4}\)
B. \(\frac{Q}{2}\)
C. 2Q
D. 4Q
Markscheme
B
Examiners report
Power is inversely proportional to R when the potential difference is constant (as here) and proportional to R if the current is held constant. Many candidates were confused by this.
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