Understanding Electricity Lesson 3

The basic device for making electricity by chemical action is the

• battery

• electrolyte

• thermocouple

• cell

The positive plate in a cell is called

• anode

• cathode

• primary cell

• secondary cell

Four 1.5-volt cells can be connected to produce a potential difference of

• 0.15 volts

• 4.0 volts

• 6.0 volts

• 8.0 volts

In the cells of an automotive battery, the electrolyte is

• ammonium chloride

• alkali

• sulfuric acid

• barium titanate

If the positive electrode of one cell is connected to the negative electrode of the next, the cells are connected in

• pairs

• tandem

• parallel

• series

You must be careful when recharging a lead-acid battery, because it can do any of the following EXCEPT

• explode

• produce flammable gases

• break and throw acid on you

• overheat and melt down

Motors and generators take advantage of the close relationship between

• gears and ratios

• cells and batteries

• electricity and magnetism

• static and current electricity

A voltmeter connected to a thermopile is usually calibrated in

• degrees

• volts

• meters

• seconds

Photovoltaic, photoconductive, and photoemission devices are types of

• batteries

• thermopiles

• electronic tubes

• photoelectric devices

Devices that must operate at precisely-controlled frequencies have crystals made of

• barium titanate

• quartz

• Rochelle salts

• salt