Sound — Physics STD 10 — Question

A lens forms an erect, magnified and virtual image of an object. name the type of lens.

Energy can exist in several forms and may change from one form to another. For the following, state the energy changes that occur in:
explosion of crackers.

What happens to the resistance if the conductor is made thinner?

Can you guess the focal length of a plane mirror?

What kind of thermometer is commonly used?

Name the physical quantity that measures the degree of hotness.

When does the nucleus of an atom tend to be radioactive?

Can a simple machine act as a force multiplier and a speed multiplier at the same time?

State the energy changes which take place when:
A bulb glows, when torchlight is switched on.

Write down a relationship to convert temperature on the Fahrenheit to Celsius scale.