A blacksmith hammers a hot piece of iron while making a tool.How does the force due to hammering affect the piece of iron ?

A rectangular pieces of soft iron is placed in a uniform magnetic field. Correct representation of the lines of force in the region of space is

A solid piece of iron of dimensions 49xx33xx24 is moulded into a sphere is

A piece of iron of density 7.8 xx 10^(3) kgm^(-3) and volume 10^(-4) m^(3) is fully immersed in water. Calculate (i) weight of the iron piece in air (ii) upthrust of water on the iron piece (iii) apparent weight of the iron piece in water. Given g=10ms^(-2)

In the following situations identify the agent exerting the force and the object on which it acts.State the effect of the force in each case. 1) Squeezing a piece of lemon brtween the fingers to extract its juice. 2) Taking out paste from a toothpaste tube. 3) A load suspended from a spring while its other end is on a hook fixed to a wall. 4) An athlete making a high jump to clear the bar at a certain height.

Mark *T' if the statement is true and 'F' if it is false: An electromagnet does not attract a piece of iron.

The hysteresis loop of a soft iron piece has a much smaller area than that of a carbon steel plece. If the material is to go through repeated cycles of magnetisation, which piece will dissipate greater heat energy?

State for each of the following whether it is due to evaporation or condensation: Stream rising from wet clothes while they are ironed.