Gate2017 ss Q9

9An air pressure contour line joins locations in a region having the same atmospheric pressure. The following is an air contour plot of a geographical region. Contour lines are shown at 0.05 bar intervals in this plot.

If the possibility of a thunderstorm is given by how fast air pressure rises or drops over a region, which of the following regions is most likely to have a thunderstorm?

Option : C
Explanation :
Region Air pressure difference
P 0.95 - 0.90 = 0.05
Q 0.80 - 0.75 = 0.05
R 0.85 - 0.65 = 0.20
S 0.95 - 0.90 = 0.05
In general thunderstorms are occurred in a region where suddenly air pressure changes (i.e.,) sudden rise (or) sudden fall of air pressure. From the given contour map in ‘R’ region only more changes in air pressure. So, the possibility of a thunderstorms in this region.
So option C. is correct.

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