In a house, individual power of two elements are 10OW and 150 W . Effective power of their series combination will be

In a house, individual power of two elements are 100 W and 150W. Effective power of their series combination will be .

If two lenses of power + 1.5 and + 1.0 D are placed in contact, then the effective power of combination will be

If two lenses of power +1.5 D and +1.0 D are placed in contact ,then the effective power of combination will be

Which property of an element is called as combining power of it ?

A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be

A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be

Two resistances , each of magnitude 2Omega are connected in series and a potential difference of 2 V is applied at the two ends of the combination . What is the power of the combination?