Question 25
Question 25 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
3. Waves
3.2.4. Dispersion of light

Know the traditional seven colours of the visible spectrum in order of frequency and in order of wavelength

3. Waves
3.4. Sound

State the approximate range of frequencies audible to humans as 20Hz to 20000Hz

3. Waves
3.3. Electromagnetic spectrum

Know the main regions of the electromagnetic spectrum in order of frequency and in order of wavelength