Question

a device that could either increase or reduces the voltage

Answer 1

The Government of India should have taken the following steps   (i) In areas where trees are cut for making sleepers, plant similar nature of trees to those that are cut, so that the forest cover is maintained.   (ii) Try to increase coal mining and supply this to the railways as fuel instead of wood, for running the steam engines.   (iii) Limit the cutting of trees by the natives of the forest to only what they personally require and not allow them to trade in wood.   (iv) Prevent poachers from entering the forests to cut wood illegally.  

Answer 2

Transformers..............................