JAMB Physics 1990 Question 41

Question 41

Electrical Energy and Power

Which of the following is an essential physical property of the wires used for making fuses?

  1. A.Low density
  2. B.High thermal conductivity
  3. C.Low electrical resistivity
  4. D.Low melting point
Show the answer and explanation

Answer: D (Low melting point)

Explanation

A fuse wire must melt quickly when too much current heats it, so it needs a low melting point.