T5_Electrical_Principles_part_1

Electrical current is measured in which of the following units?

• Volts
• Watts
• Ohms
• Amperes

Electrical power is measured in which of the following units?

• Volts
• Watts
• Watt-hours
• Amperes

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

• Voltage
• Resistance
• Capacitance
• Current

What are the units of electrical resistance?

• Siemens
• Mhos
• Ohms
• Coulombs

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

• Voltage
• Ampere-hours
• Capacitance
• Inductance

What is the unit of frequency?

• Hertz
• Henry
• Farad
• Tesla

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

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

Which term describes the rate at which electrical energy is used?

• Resistance
• Current
• Power
• Voltage