(Savvas 20.4) Ch. 20.4 Electronic Devices

Which type of signal is usually used by an AM radio station?

• frequency modulated signal

• amplitude modulated signal

• digital signal

• pulse signal

Answer explanation

Amplitude modulating signal is used by an AM radio station.

Frequency modulating signal is used by an FM radio station.

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NGSS.HS-PS4-5

Digital signals are more reliable than analog signals.

• True

• False

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NGSS.HS-PS4-2

An image is produced in a cathode ray tube (CRT) when phosphors glow red, green, and blue in response to electron beams.

• True

• False

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NGSS.HS-PS4-5

A semiconductor is a material that

• conducts electricity better than insulators but worse than conductors.

• does not conduct electricity at all.

• conducts electricity better than conductors.

• is a type of metal.

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NGSS.HS-PS1-3

NGSS.HS-PS2-5

Which type of semiconductor can be made by adding a trace amount of boron to silicon, which attracts electrons to positively charged holes on each boron atom?

• p-type semiconductor

• n-type semiconductor

Match each solid-state electronic component to its definition.

• A solid-state component that combines an n-type and p-type semiconductor

• integrated circuit

• A solid-state component with three layers of semiconductors

• diode

• A thin slice of silicon that contains many solid-state components

• transistor

Electronic signals carry information through patterns in the controlled flow of electrons through a circuit. Which type of electronic signal can be produced by pulsing current on and off?

• analog signal

• digital signal

Answer explanation

The digital signal can be produced by pulsing a current on and off.

The analog signal can be produced by smoothly changing voltage.

Allows current to flow in only one direction

• Resistor

• Diode

• Capacitor

An electronic device that can be a switch for current or an amplifier for voltage

• Resistor

• Diode

• Capacitor

• Transistor

What are examples of semiconductors?

• Copper and aluminum

• Silicon and germanium

• Rubber and glass

• Water and air