The polarity of the current changes according to its frequency ______.
The special wire that melts when certain amount of electricity flows through it is ______.
What is the full form of MCB?
______ is a source of sound that converts electrical energy into kinetic energy and then sound energy.
______ is a system where excessive electricity is passed through it into the ground.
In household normally ______ of fuse is used.
In small scale industries up to ______ of fuse is used.