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JAMB Physics 2020 Paper

Question : 31

Total: 38

_{1}

_{2}

_{2}

_{1}

is?

Solution:

Concept:

Total pressure at a depth equals atmospheric pressure plus the pressure due to the water column above.

Explanation:

Atmospheric pressure is equal to the pressure of a

10\,m

water column.

So, pressure at depth

d

is proportional to

(d + 10)

For diver G at

20\,m

P_1 = 20 + 10 = 30

units.

For diver H at

40\,m

P_2 = 40 + 10 = 50

units.

Therefore, ratio:

\frac{P_2}{P_1} = \frac{50}{30} = 1.67

Answer:

P_2/P_1 = 1.67

Correct option: C. 1.67

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