Deck 4: Basic Circuit Concepts

Question 1

In measuring the rate of electron flow, we are concerned with simple speed rather than a quantity rate.

Answer 1

False

Question 2

____ is the force that pushes the electrons through a circuit in much the same way that pressure pushes liquid through a pipe.

A)Voltage
B)Current
C)Watts
D)Resistance

Answer 2

A

Question 3

Common materials of lowest resistance are the best ____.

A)insulators
B)generators
C)resistors
D)conductors

Answer 3

D

Question 4

A(n) ____ circuit is required to allow the current to flow whenever electrical energy is needed by a load.

A)open
B)short
C)closed
D)resistant

Question 5

Electron theory defines current flow as a motion of free electrons from the negative pole of a source, through the outer circuit path, and back to the positive pole.

Question 6

Common materials of highest resistance (so high it is difficult even to measure) are the least effective insulators.

Question 7

To prevent ____, fuses or circuit breakers are used in series with each house circuit.

A)internal friction
B)a short circuit
C)a path of high resistance
D)an open circuit

Question 8

One ____ is a flow rate of 1 coulomb/second.

A)watt
B)ohm
C)ampere
D)psi

Question 9

Ordinary lightbulbs, called incandescent lamps, operate on the principle of ____.

A)incandescence
B)resistance
C)conduction
D)friction

Question 10

Voltage is always measured between three points of different potential.

Question 11

The effect of current through the body is harmful, and currents as low as ____ ampere are generally fatal.

A)0.05
B)0.15
C)0.25
D)0.5

Question 12

The internal friction, which retards the flow of current (electrons) through a material, is called electrical ____.

A)conduction
B)resistance
C)reduction
D)convection

Question 13

A short circuit is a parallel path of extremely high resistance, often caused accidentally.

Question 14

Electrical resistance can be measured with an ohmmeter.

Question 15

We use an instrument known as a voltmeter to measure voltage.

Question 16

The ampere is a measure of the amount of electrical energy that is changed to some other form.

Question 17

To avoid or minimize electrical shock, one should never touch two wires at the same time.

Question 18

The four fundamental concepts that constitute the elements of an electric circuit are ____.

A)voltage, current, resistance, and amps
B)flow, current, resistance, and watts
C)current, resistance, watts, and force
D)voltage, current, resistance, and watts

Question 19

It is practical to convey ideas about circuits by means of graphic symbols known as schematic diagrams, or schematics.

Question 20

The foremost guide to electrical safety is the ____.

A)National Electrical Guideline®
B)National Electrical Code®
C)American Electrical Code®
D)Guide to Electrical Code®