Question 4
Question 4 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
25. Astronomy and cosmolo...
25.1. Standard candles

recall and use the inverse square law for radiant flux intensity F in terms of the luminosity L of the source F = L / (4πd²)

9. Electricity
9.3. Resistance and resistivity

understand that the resistance of a light-dependent resistor (LDR) decreases as the light intensity increases

8. Superposition
8.3. Interference

recall and use λ = ax/D for double-slit interference using light