Exam 15: Basics of Electrical Systems

The unit for measuring electrical resistance is _____.

The voltage in a hybrid vehicle can rang up to _____ volts.

Electromotive force is usually called ____________________.

Technician A says the amount of electricity produced by an AC generator depends on the strength of the magnetic field. Technician B says it depends on the speed at which the magnetic field moves past the wires. Who is correct?

What is a solenoid?

When an electron leaves the orbit of an atom, the atom then has a positive charge.

A momentary contact switch is used to operate the _____.

To complete the electrical path to the vehicle's battery, the vehicle's metal frame components are often part of the electrical circuit.

The electrical system of a modern automobile runs at _____ volts when the engine is running.

What is electromagnetic induction?

A circuit that is complete and does not have anything to prevent the flow of electrical current through it has ____________________.

The chemical reaction in a battery causes a lack of electrons at the positive (+) terminal.

Technician A says 42-volt automotive electrical systems can use smaller wires to supply the same amount of power to electrical accessories. Technician B says a 42-volt electrical system is very dangerous and can kill you if your skin comes into contact with exposed wiring. Who is correct?

As temperature increases, the resistance of a NTC [negative temperature coefficient] thermistor ____________________.

A parallel circuit can only have one load on each leg.

Describe the difference between the terms "electrical" and "electronics."

All the following are used as circuit protection EXCEPT:

Electricity is the flow of protons from one atom to another.

What is the current in a 12-volt circuit with a 6-ohm resistor connected series?

Circuit breakers are being discussed. Technician A says after the circuit breaker is tripped, it must be reset by pressing a button on the breaker. Technician B says some circuit breakers automatically reset after the power has been turned off for a few seconds. Who is correct?