ASVAB Electronics Information

A material whose atoms have more electrons than empty spaces (holes) in their valence shells

Insulator

A conductor is a material whose atoms have more _____ than _______ in their valence shells.

holes, electrons

A substance whose atoms have their valence shells exactly half full of electrons

semiconductor

What is this?

Fixed resistor

What is this?

Ohmeter

What is this?

Voltmeter

What is this?

Ammeter

What is this?

Fuse

What is this?

Circuit breaker

What is this?

Capacitor

What is this?

AC Power Supply

What is this?

Transformer

What is this?

Transformer

What is this?

Diode

What is the unit of electrical power?

Watt

What is a capacitor?

Two thin metal plates separated by air or an insulating material

How are the plugs in a house wired up?

In a parallel circuit

What should you do before using an Ohmeter to measure resistance in a circuit component?

Disconnect the power source

What is a transformer used for?

To increase or decrease current

What does a diode do?

Let’s current pass one way but blocks it the other way

What is a load device?

A device connected to a circuit which draws electric power to perform some function and creates resistance, e.g. a light bulb or speaker

What is the unit of electric current?

Amperes (amps)

What is the unit of resistance?

Ohms

What is an open circuit?

A circuit that has a broken path so that no current can flow.

What is a short circuit?

A circuit that allows current to travel along an unintended path, by connecting parts of the circuit that aren’t supposed to be connected.

What does an Ammeter measure?

current

What does an Ohmeter measure?

resistance

How should an ammeter be used?

Connect in series with the circuit

How should a voltmeter be used?

Connect in parallel with circuit