A lens has a power of +2.0 Dioptre. Which one of the following statements about the lens is true?
The lens is concave and has a focal length of 0.5 metre
The lens is convex and has a focal length of 2.0 metre
The lens is convex and has a focal length of 0.5 metre
The lens is concave and has a focal length of 2.0 metre
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy