The diagram above show s the force-extension curve of a piece of wire. The energy stored when the wire is stretched from E to F is?

The resistance of a pieces of wire of length 20m are crossed-sectional area 8 x 10 -6m2is?


[Resistivity of the wire = 4 x 10-7 Ω m]

A spring of force constant 500 NM-1 is compressed such that its length shortens by 5cm. The energy stored in the spring is?

If a load of mass 10N stretched a cord by 1.2cm, what is the total work done?

If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire