Automotive Technology Ch.39 & 40

Which unit of electricity does the work in a circuit?

Amperes

Like charges

repel

How many watts are consumed by a starter motor if it draws 150 amperes at 10 volts?150a × 10 v =

1,500 watts

If 12 volts are being applied to a resistance of 3 ohms, ________ amperes will flow.

4

If an insulated wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle, the type of failure would be called ________.

Short-to-ground

If the voltage increases in a circuit, what happens to the current (amperes) if the resistance remains the same?

Increases

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

Knock Sensor

Creating electricity by exerting a force on a crystal is called ____________.

Piezoelectricity

Carbon and silicon are examples of ______

Semiconductors

Which circuit failure is most likely to cause the fuse to blow?

Short-To-Ground

If two insulated wires were to melt together at the point where the copper conductors touched each other, the type of failure would be called a(n)________.

Short-to-voltage

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

Throttle position

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

less than 4

The ___________ is a unit of electrical pressure.

volt

How many watts are consumed by a lightbulb if 1.2 amperes are measured when 12 volts are applied? 12v × 1.2a =

14.4 watts

If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery?

200 amps

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

High resistance in an electrical circuit can cause ___________.

Dim lights,Slow motor operation,Clicking of relays or solenoids, and No operation of a circuit or electrical component.

What is the symbol for voltage used in calculations?

E

As temperature increases,____________.

The resistance of a conductor increases