Electronics in Agriculture Review Questions

A is a magnetized piece of black iron oxide.

• Onyx

• Coal

• River stone

• Lodestone

developed the first battery.

• William Gilbert

• Charles du Fay

• Allesandro Volta

• Benjamin Franklin

is a three-terminal semiconductor device used for amplification, switching, and detection.

• transistor

• conductance

• capacitance

• radio

The ability of a material to carry electrons or electricity is called

• resistance

• resistivity

• reciprocation

• conductance

A variable resistor used to control voltage is called a

• pot

• rheostat

• conductor

• meter

Before using an analog meter, adjust the pointer to indicate

• ten

• zero

• one

• hundred

The unit of measure of inductance is called

• the henry

• an ohm

• a watt

• a volt

The ability of a device to store electrical energy in an electrostatic field is

• inductance

• resistance

• wattage

• voltage

are the simplest type of semiconductor.

• Thyristors

• Optoelectrics

• Amplifiers

• Diodes

Viscosimeters can

• monitor body temperature in livestock populations

• help a farmer to determine the best time to breed a cow

• indicate thickening of milk or presence of blood clots in dairy cattle

• monitor milk-cooling operations to ensure proper cooldown for milk quality