Question 15
Question 15 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
5. Work, energy and power
5.1. Energy conservation

use the concept of efficiency to solve problems

9. Electricity
9.3. Resistance and resistivity

explain that the resistance of a filament lamp increases as current increases because its temperature increases