Force, Work, Power and Energy — Physics STD 10 — Question

Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality? Give a reason for your answer.

Define resistivity of a metal.

What kind of energy is possessed in a situation when?
A stone lying on the top of roof.

A lens forms an erect, magnified and virtual image of an object.Where is the object placed in relation to the lens?

Calculate the force which will produce a moment of force of 1575 dyne-cm, when the perpendicular distance between point of application of force and turning point is 45 cm.

What do you understand by the statement sp. latent heat of vapourisation of steam is 2268 J/kg?

Name a machine to obtain gain in speed ?

Name the forms of energy which a wound-up watch spring possesses.

What type of lenses are used in spectacles worn by an old lady for knitting?

A radioactive source emits three types of radiations.

Name the radiations which are deflected by the electric field.