Lesson 3 Current Electricity

The basic device for making chemical electricity by chemical action is the

• Battery

• Electrolyte

• Thermocouple

• Cell

The positive plate in a cell is called the

• Anode

• Cathode

• Primary cell

• Secondary cell

Four 1.5 V cells can be connected to produce a potential difference of ___ V.

• 0.15

• 4.0

• 6.0

• 10.5

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 charging a lead-acid battery because it can do any of the following except

• Explode

• Produce flammable gasses

• 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, photoemission devices are types of

• Batteries

• Thermopiles

• Electronic tubes

• Photoelectric devices

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

• Barrium titanate

• Quartz

• Rochelle salts

• Salt