Questions

The technology giant Apple has been named as the most innovative company of 2016, as per Boston Consulting Group (BCG) 2016 analysis. In the list of world’s 50 most innovative companies, Google has been ranked second, followed by Tesla Motors, Microsoft, Amazon, Netflix, Samsung, Toyota, Facebook and IBM. 

Dust particles such as coal dust(smoke) are fine particle of a solid (carbon in the case of smoke) dispersed in air. They are colloidal systems and the particles are charged either positive or negative. In an applied electrical field, they are attracted towards the opposite electrodes. Movement of the particles towards the electrodes is known as 'electrophoresis'. Hence electrophoresis is applied to remove smoke within the chimeny itself without allowing it to escape into the air and cause nuisance.

Getting the value of an environment variable is done by using `getenv()’. Setting the value of an environment variable is done by using `putenv()’