Transformer is used for -

Example of complementary unit?

What is the unit of power of the lens in SI method?

What will remain unchanged if the quantity of the commodity changes?

Which one of the following is not a vector amount?

What is the decibel level of sound produced by two persons in conversation? 

The product of mass and velocity of an object is called-

Satellite is kept moving in its orbit around the Earth, it is due to –