What is the difference between a CFL and an LED lamp? 1.To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material. 2.The average life span of a CFL is much longer than that of an LED lamp. 3.A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?
1 only
2 and 3 only
1 and 3 only
2 and 1
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