
The pyramid shown represents a (D) Declining population.
Expanding: Expanding populations have a wide base (lots of births) and progressively narrower tiers. This represents a high birth rate and lower life expectancy.
Stable: Stable populations have relatively even tiers, with only a slight tapering towards the top. Birth and death rates are relatively balanced. This is what the image depicts.
Declining: Declining populations have a narrow base (few births) and wider tiers in the older age groups. This represents a low birth rate and a higher life expectancy.
A population pyramid is a graphical representation of the age and sex distribution of a population. It typically shows the proportion of males and females in various age groups. Population pyramids are used by demographers and policymakers to understand the demographic structure of a population and to assess social and economic trends.
The pyramid shown represents a (D) Declining population.
The circuit shown in the figure contains two ideal diodes \( D_1 \) and \( D_2 \). If a cell of emf 3V and negligible internal resistance is connected as shown, then the current through \( 70 \, \Omega \) resistance (in amperes) is: 