Question

Which of the following would not be a good fuse design? low-melt wire encased in glass low-melt wire encased in ceramic low-melt wire encased in iron low-melt wire encased in a tube of air

Answer 1

The wire encased in iron.  This is because iron conducts current so the fuse would still work well above the rated current!

Answer 2

low melt wire encased in glass

Step-by-step explanation:

Fuse wire is a safety device for an electrical appliance. It works on heating effcet of current. It has low melting point and high resistance.

A fuse wire is a low melting point wire encased in glass.