" What is the principle behind the carburetor of an automobile? "

What is the principle behind starch test?

What is the principle behind a mercury barometer?

What is the principle behind diffusion of gases?

What is the principle behind a beam balance?

What is the principle behind working of sonar ?

What is the principle behind a compass needle?

Answer the following questions : What is the principle behind the working of a satellite launch vehicle?

What is the principle behind the working of a transformer ? Mention any two sources of energy loss in transformer