Chapter 39

The fact that voltage can be created by exerting force on a crystal is used for which type of​ sensor?

Knock sensor​ (KS)

Carbon and silicon are examples of​ ________.

Semiconductors

Which of the following statements is true of​ conductors?

If the conductor diameter in​ increased, its resistance is reduced.

An electrical conductor is an element with​ ________ electrons in its outer orbit.

Less than 4

Two technicians were discussing the characteristics of magnets. Technician A stated that if the same poles of two magnets are brought close to each​ other, the magnets will snap together. Technician B stated that if the opposite poles of two magnets are brought close to each​ other, the magnets will push each other apart. Which of the following statements about this scenario is​ true?

Neither technician​ A's nor technician​ B's assessment is accurate.

Two technicians were discussing the characteristics of the valence ring of an atom. Technician A stated that the number of electrons in the valence ring of an atom indicates its capacity to combine with other atoms. Technician B stated that if the valence ring of an atom has three or fewer​ electrons, it is hard for a drifting electron to push its way into the valence ring. Which of the following statements about this scenario is​ true?

Only technician​ A's assessment is accurate.

Two technicians had different views on the formation of ions. Technician A stated that if an atom gains more electrons than​ protons, it will be positively charged. Technician B stated that an atom becomes an ion when it is unbalanced. Which of the following statements about this scenario is​ true?

Only technician​ B's assessment is accurate.

Creating electricity by exerting force on a crystal is called​ ________.

Piezoelectricity

Like charges​ ________.

Repel

Which of the following statements is true of electrical​ measurements?

The volt is the unit of measurement for the amount of electrical pressure.

A​ potentiometer, a​ three-wire variable​ resistor, is used in which type of​ sensor?

Throttle position​ (TPS)

The​ ________ is a unit of electrical pressure.

Volt

If the current flow across the circuit is 2 amperes and the electrical pressure is equal to 10​ volts, determine the electrical power of the circuit.

20 watts

Which unit of electricity does the work in the​ circuit?

Ampere

Which of the following is true of an​ atom?

An atom has a neutral charge.

Which of the following is true of sources of​ electricity?

An engine knock sensor​ (KS) uses the principle of piezoelectricity to create a voltage signal for use as an engine computer input signal.

Technician A says that a​ two-wire variable resistor is called a rheostat. Technician B says that a​ three-wire variable resistor is called a potentiometer. Which technician is​ correct?

Both technicians A and B

Two technicians had different views on electrical pressure. Technician A stated that electrical pressure is a result of excess electrons remaining at one end of the circuit. Technician B stated that it is possible to have electrical pressure without any current flow. Which of the following statements about this scenario is​ true?

Both technician​ A's and​ B's assessments are accurate.

Two technicians were discussing the working principles of different automotive devices. Technician A stated that a starter motor works on the principle that electricity is produced if a conductor is moved through a magnetic field. Technician B stated that an alternator also works on the principle that electricity is produced if a conductor is moved through a magnetic field. Which of the following statements about this scenario is​ true?

Both technician​ A's and​ B's assessments are accurate.

As temperature​ increases, ________.

The resistance of a conductor increases