Substances that are burnt to give heat are called
Fuels
Metals
Non-metals
None of these
The shiny liquid metal in the thermometer is
Copper
Iron
Silver
Mercury
A very narrow tube in a thermometer is called a
Capillary tube
Vascular tube
Electrical tube
A spherical mirror in which the outer surface is reflecting is called a
Concave mirror
Convex mirror
Plane mirror
Temperature is measured using a
Scale
Thermometer
Manometer
Barometer
A mirror in which the inner hollow surface is the reflecting surface is called a
In a concave mirror, if the object is at the focus, the image is
At infinity
At the focus
Behind the mirror
At the centre of curvature
When rice is placed in water and heated , it gets cooked.It is a
Physical change
Chemical change
Mechanical change
Nuclear change
Which of the following is denoted by P.?
Principle focus
Pole
Principal axis
Which of the following is used as shaving mirrors?
