LESSON 1.

PRACTICAL EXERCISE - ANSWERS

Requirement

a.

A conductor is defined as any material that will permit the flow of

electricity through it, while an insulator is defined as any material

that blocks the flow of electricity through the material.

b.

The two types of agents used to extinguish a fire are carbon dioxide

(CO2) and potassium chloride or purple K (PKP).

c.

Ampere is defined as the basic unit of electrical current. Voltage is

the term used to signify electrical pressure.

Voltage is a force

which causes current to flow through an electrical conductor.

Resistance is defined as the opposition which a device or material

offers to the flow of current.

d.

The term efficiency of an electrical device is the ratio of power

converted to useful energy divided by the power consumed by the

device.

e.

A series circuit is defined as a circuit that contains only one path

for current flow.

f.

A circuit is said to be an open circuit when a break exists in a

complete conducting pathway.

g.

A short circuit is an accidental path of low resistance which passes

an abnormally high amount of current.

h.

A parallel circuit is defined as a circuit having

more

than

one

current path connected to a common voltage source.