A fuse or fuse wire that is used in domestic electrical appliances is made of a metal of

Options :
  1. low melting point
  2. low specific gravity
  3. low resistance
  4. None of the above
Answer and Explanation :-

Answer: Option 1


A fuse or fuse wire used in domestic electrical appliances is a type of low resistance resistor that acts as a sacrificial device to provide over-current protection, of either the load or source circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, interrupting the circuit that it connects. Short circuits, overloading, mismatched loads, or device failure are the prime reasons for excessive current. Fuses are generally made of metals or alloys of zinc, copper, aluminium, etc. having a low melting point. Under normal operating conditions it is designed to carry the full load current. If the current increases beyond this designed value due any of the reasons mentioned above, the fuse melts (said to be blown) isolating the power supply from the load.

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : The contents of an ordinary tube light used for lighting purposes are which of the following?

Next Question : In a black and white television set the picture tube has only one electron gun that produces the pic...

Click here for online test on General Science


 (Getemail alerts when others member replies)

The eye of true equality often seems to have some degree of disrespect for the supposedly accomplished, privileged high and lofty to the supposedly accomplished, privileged high and lofty, although in reality, it's simply irrespectiveness.
-Criss Jami