Chapter 8: Electric Basics

Electrical current is measured in which of the following units?

• Volts

• Watts

• Ohms

• Amperes

What is the name for the flow of electrons in an electric circuit?

• Voltage

• Resistance

• Capacitance

• Current

What is impedance?

• The opposition to AC current flow

• The inverse of resistance

• The Q or Quality Factor of a component

• The power handling capability of a component

What is the electrical term for the force that causes electron flow?

• Voltage

• Ampere-hours

• Capacitance

• Inductance

Why are metals generally good conductors of electricity?

• They have relatively high density

• They have many free electrons

• They have many free protons

• All these choices are correct

Tags

NGSS.HS-PS1-3

Which of the following is a good electrical insulator?

• Copper

• Glass

• Aluminum

• Mercury

Which of the following describes alternating current?

• Current that alternates between a positive direction and zero

• Current that alternates between a negative direction and zero

• Current that alternates between positive and negative directions

• All these answers are correct

What are the units of electrical resistance?

• Siemens

• Mhos

• Ohms

• Coulombs

What type of current flow is opposed by resistance?

• Direct current

• Alternating current

• RF current

• All these choices are correct