Materials Science Questions

An electrical switch that operates under the control of an outside electrical signal.

A device that produces electrical energy when it absorbs light.

A half-wave rectifier produces a direct current output with no gaps between the waves.

Current will flow through a diode when the positive terminal of a battery is connected to the cathode and the negative terminal is connected to the anode.

A ____ installed in a gas furnace stops producing a voltage when the pilot light flame goes out.

A solid-state device that allows current to flow in both directions.

A microprocessor functions as the control center of a system and can accept information, store it, and react in some preset way.

An electromagnetic device that is often used in HVACR systems to control refrigerant or water flow.

A ____ is a layered, three-terminal semiconductor device that is used to either switch or amplify an electrical signal.

Functions as the control center of an entire system and can accept information, store it, and react in some preset way.

In order for current to flow through a diac, the applied voltage must reach or exceed the diac's breakover voltage.

The negatively charged side of a diode is called the anode.

In HVACR, thermistors may be used to stop electrical power from going to an overheating motor.

P-type material has positively charged spaces called ____.

A diode is a solid-state device composed of only P-type material.

Positive temperature coefficient (PTC) thermistors increase their resistance as their temperature ____.

A diode setup is ____ biased if the positive terminal of a battery is connected to the anode and the negative terminal is connected to the cathode.

Sensors are devices that detect and respond to some kind of stimulus.

A ____ is a device that converts an input signal from one form of energy to an output signal of another form of energy.

Applied voltage below the breakover voltage will not be able to force current through a diac.