Heat — Physics STD 10 — Question

A body falls freely under gravity from rest. Name the kind of energy it will possess at the point from where it falls.

Name the radiations whose wavelength range is from 100 Å to 4000 Å (or 10 nm to 400 nm).

Which type of lever has a mechanical advantage always more than one? Give one example. What change can be made in this lever to increase its mechanical advantage?

Is it possible to have an accelerated motion with a constant speed? Name such type of motion.

Name the two groups in which various sources of energy are classified?

Name a machine which is used to change the direction for force applied.

A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor.

Why is the focal length of the lens, used as a magnifying glass, kept short?

What is a calorimeter?

Explain the term mechanical advantage. State its unit.