Electrical safety

For current to flow, there must be a difference in ___ between two locations and path connecting them.

• electrical potential

• current

• resistance

• ohms

What is the unit for electrical potential?

• volts

• ohms

• amps

• coulombs

A bird perched on one electrical wire will not get shocked because there is no difference in electrical potential between its feet.

• true

• false

When a bird touches two wires of different voltage, it will get shocked.

• true

• false

If you place a metal ladder against an electric power line and climb it, you will not get shocked because you are so far from the ground.

• true

• false

It is a good idea to not plug too many things into one outlet, since there is a risk of overloading the circuit at that outlet.

• true

• false

It is generally okay to use electrical devices around water if you use a good quality extension cord.

• true

• false

It is a good idea to not play around green transformer yard boxes or climb the fence around an electrical substation.

• true

• false

An electrical ground provides a alternative path for current if something goes wrong in a circuit or device.

• true

• false

Select all the true statements about electrical ground.

• The earth is a terrific electrical ground because it has very low electrical potential.

• Your home can be grounded to a cold water pipe or a rod driven into the ground outside.

• The round hole on a three prong wall plug is the electrical ground.

• The sky is the best electrical ground because it is so immense.