All wires used in electric circuits should be covered with:

1. Coloring material
2. Conducting material
3. an insulating material
4. none of the above

Electrical work done per unit time is:

1. electrical energy
2. electric current
3. electric voltage
4. electrical power

Fuse wire is an alloy of:

1. tin-lead
2. copper-lead
3. tin-copper
4. lead-silver

A fuse wire should have:

1. a low melting point
2. high melting point
3. very high melting point
4. none of the above