10125 J of heat energy boils off 4.5 g of water at 100°C to steam at 100°C. Find the specific latent heat of steam.

It is established that an electric current through a metallic conductor produces a magnetic field around it. Is there a similar magnetic field produced around a thin beam of moving

(a) α-particles and

(b) neutrons? Justify your answer.

Two lenses have power of

(a) +2 D and

(b) -4 D

What is the nature and focal length of each lens?

Study the following electric circuit. Find the reading of

(a) the ammeter and

(b) the voltmeter