Botanical gardens are examples of ex-situ conservation, where plants are conserved outside their natural habitat.
Wildlife sanctuaries, biosphere reserves, and national parks are all examples of in-situ conservation, where species are protected in their natural environment.
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is : 
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: