Exam 15: Basics of Electrical Systems

Technician A says current will increase with a decrease in resistance. Technician B says current will decrease with an increase in resistance. Who is correct?

Technician A disconnects the battery ground cable prior to replacing a fusible link. Technician B uses a fusible link that is larger [lower gauge number] than the circuit it protects. Who is correct?

Electrons have a ____________________ charge.

Voltage stays constant in a closed electrical circuit, but the amperage drops as it powers a load.

Which of the following is a source of energy in an automobile's electrical system?

The electrical principle that states "the sum of the voltage drops in a closed circuit equals the voltage applied to that circuit" is known as _____ law.

A circuit protection device such as a fuse, fuse link, or circuit breaker will open the circuit if resistance values become too great.

In the formula E = I x R, I represents_____.

Alternating current constantly changes in voltage and direction.

____________________ are materials with a low resistance to the flow of current.

Electrical power is measured in ____________________.

Electromotive force is measured in volts.

Which type of resistor is commonly used in automotive circuits?

Identify the four basic parts of a typical automobile electrical circuit.

Wire sizes are being discussed. Technician A says an AWG 20 gauge wire is larger than an AWG 22 gauge wire. Technician B says a metric 1.0 gauge wire is smaller than a metric .8 gauge wire.

____________________ are materials that resist the flow of current.

The function of a resistor in an electrical circuit is to limit _____.

What factors affect the resistance of a copper wire?

Technician A says late model cars use maxifuses instead of fusible links. Technician B says fusible links are normally found in the engine compartment near the battery. Who is correct?

Switches are being discussed. Technician A says that "pole" refers to the number of output circuits. Technician B says that "throw" refers to the number of input circuits. Who is correct?