Solid grease
Petroleum jelly
Lubricating oil
Liquid grease
Decreases
Increases
Remain same
Falls to zero
Convert AC to DC
Convert low voltage DC to high voltage DC
Convert low voltage AC to high voltage AC
Convert DC to AC
SCR
Metal rectifiers
Bridge rectifiers
Full wave rectifiers
Uni directional Power Supply
Un interrupted Power Supply
Uniform Power Supply
Un regulated Power Supply