Physics
When 2240 J of heat is supplied to a metal piece of mass 450 g, its temperature rises from 25°C to 65°C. Then, find
(a) heat capacity of metal piece and
(b) specific heat capacity of metal.
Related Questions
(a) Ring system is a better wiring system, why?
(b) State the relation between electrical power, resistance and potential difference in an electrical circuit.
Explain any two factors on which the internal resistance of a cell depends.
An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm. If the distance of the object from the optical centre of the lens is 20 cm, determine the position, nature and size of the image formed using the lens formula.
(a) Figs. I and II show the incident and transmitted rays through lens kept in a box in each case. Draw the lens and complete the path of rays through it.
(b) What is the difference between double convex and bi-convex lens?
(c) Does convex lens always form real images?