Ch 3 Electrical Fundimentals

Carbon and silicon are examples of ________. Insulators Semiconductors Columbs Conductors

Semiconductors

Insulators lose electrons in their outer shell easier than conductors. True False

False

Semiconductors have how many electrons in their valence rings? More than four Four Less than four None of the above

Four

A positively charged atom is called a(n) ________. Ion Quark Neutron None of the above

Ion

An electrical conductor is an element with ________ electrons in its outer orbit. Less than 2 Less than 4 Exactly 4 More than 4

Less than 4

Electrical power is calculated by ________. Multiplying volts by ohms Multiplying volts by current Dividing voltage by current None of the above

Multiplying volts by current

Like charges ________. Add Repel Attract Neutralize each other

Repel

It is relatively easy to move an electron from the valence ring of a conductor. True False

True

The outer electron shell is known as a(n) ________. Unstable shell Valence ring Distant ring None of the above

Valance ring

The ________ is a unit of electrical pressure. Ampere Volt Ohm Coulomb

Volt

Electromotive force is another term for ________. Resistance Current Voltage None of the above

Voltage

Which of these is also known as electrical potential? Volts Ohms Amps None of the above

Volts

Which of these describes electrical power? Volts Amps Watts None of the above

Watts

Which unit of electricity does the work in the circuit? An ampere A coulomb An ohm A volt

An ampere

What term describes the movement of electrons from one atom to another? Chain reaction Energy transfer Electricity None of the above

Electricity

The automotive battery is based on the principle of: Piezoelectric energy Photoelectricity Electrochemistry None of the above

Electrochemistry

Technician A says that resistance increases as the diameter of a conductor increases. Technician B says that resistance increases as the temperature of a conductor increases. Which technician is correct? Technician A Technician B Both Technicians A and B Neither Technician A nor B

Technician B

As temperature increases, ________. The resistance of a conductor remains the same The resistance of a conductor increases The resistance of a conductor decreases The voltage of the conductor decreases

The resistance of a conductor increases