Question

Choose the statement which is not correct in the case of an electric fuse.

• A. Fuse wire has a low melting point.
• B.
  There is a maximum limit on the current which can safely flow through the electric circuit.
• C. There is a minimum limit on the current which can safely flow in the electric circuit.
• D. Fuse works on the principle of heating effect of electric current.

Answer 1

The correct option is C There is a minimum limit on the current which can safely flow in the electric circuit.

In case of electric fuse, there is only a maximum limit on the current which can safely flow in the electric circuit. If current exceeds the maximum limit (safe limit) the fuse will blow off and thus protects electrical appliances. Fuse wire has a low melting point so that it can melt down quickly when current greater than safe limit passes through it.