Question 24
Question 24 of 40
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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
7. Waves
7.1. Progressive waves

recall and use intensity = power/area and intensity ∝ (amplitude)² for a progressive wave

6. Deformation of solids
6.2. Elastic and plastic behaviour

understand that the area under the force–extension graph represents the work done

5. Work, energy and power
5.1. Energy conservation

define power as work done per unit time