What happens to the (i) extension (ii) maximum load, a wire can bear, when the wire is cut into half?

What happens when ? (i)

What happens when (i) mercuric oxidie and (ii) potassium nitrate are heated ?

The two wires shown in figure are made of the same material which has a breaking stress of 8xx10^8Nm^-2 . The area of cross section of the upper wire is 0.006 cm^2 and that of the lower wire is 0.003 cm^2 . The mass m_1=10 kg , m_2=20kg and the hanger is light. a. Find the maximum load that can be put on the hanger without breaking a wire. Which wire will break first if the load is increased? b. Repeat the above part m_1=10 kg and m_2=36kg .

The maximum load that a wire can sustain is W. If the wire is cut to half its value, the maximum load it can sustain is

The maximum load a wire can withstand without breaking, when its length is reduced to half of its original length, will

The maximum load a wire can withstand without breaking, when its length is reduced to half of its original length, will

The stress strain graph for a metal wire is shown in the fig. Up to the point E, the wire returns to its original state O along the curve EPO, when it is gradually unloaded. Point B corresponds to the fracture of the wire. (a) Up to what point on the curve is Hooke's law obeyed? (this point some times called proportional limits). (b) Which point on the curve corresponding to elastic limit or yield point of the wire? (c ) Indicate the elastic and plastic regions of the stress-strain graph. (d) Describe what happens when the wire is loaded up to a stress corresponding to the point A on the graph and then unloaded gradually. In particular explain the dotted curve. (e) What is peculiar about the portion of the stress- strain graph from C to B? Up to what stress can the wire be subjected without causing fracture?

A 10 m long nichrome wire having 80 Omega resistance has current carrying capacity of 5 A. This wire can be cut into equal parts and equal parts can be connected in series or parallel. What is the maximum power which can be obtain as heat by the wire from a 200 V mains supply? (in kW)

A small mass m and its supporting wire because a simple pendulum when the horizontal cord is cut . Find the ratio of the tension in the supporting wire immediately after the cord is cut to the tension in the wire before the cord is cut

A wire of cross-sectional area A breaks due to its own weight when length of the wire is l. If area of cross-section of the wire is made 3A then maximum length of the wire can be hung without breaking is