Nature of Electricity

Question 0

Electrons are much smaller than atoms

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Question 1

Atoms with free electrons in their outer orbits are poor electrical conductors

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Question 2

Electrons flow form the negative (-) battery terminal to the positive (+) battery terminal

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Question 3

Aluminum is a better conductor than copper

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Question 4

An insulator carries almost no electric current, even when a very high voltage is applied

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Question 5

Electric current is the flow of protons through a conductor

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Question 6

The wires that carry electric current in a circuit are called the conductors

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Question 7

Copper is a better conductor than silver

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Question 8

When two nonconducting substances (such as glass and fur) are rubbed together, the substance that picks up electrons from the other substance acquires a (positive, negative) ???? charge

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Question 9

An important rule concerning static charges is that like charges ????? each other and unlike charges ????? each other

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Question 10

A lightning strike occurs when (like, unlike) ???? charges develop between a cloud and the earth.

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Question 11

According to the electric series, if you use a dry flannel cloth to polish a wooden table, the table will have a (positive, negative) ????? charge when you finish

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Question 12

Static electricity can be generated by friction and by ????

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Question 13

Two methods used to eliminate static charges are ???? ad ????

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Question 14

The movement of electrons is called electric ????

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Question 15

A common source of direct current is a ???

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Question 16

If a light bulb is properly connected by wires to the terminals of a battery, electrons will leave the ???? terminal of the battery and flow through the wires toward the bulb

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Question 17

In an electrical circuit, the conductors can be compared to the ????? in a water system

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Question 18

In a water system, a valve can be compared to the ???? in an electrical system

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Question 19

Another term for electromotive force is ???

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Question 20

What is the symbol of the electrical unit volts?

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Question 21

What is the symbol of the electrical unit ampere?

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Question 22

What is the symbol of the electrical unit ohm?

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Question 23

What is the symbol of the electrical unit coulomb?

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Question 24

What is the symbol of the electrical unit watt?

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Question 25

Convert the number 43,000 to scientific notation

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Question 26

Convert the number 0.0025 to scientific notation

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Question 27

What prefix is used to indicate the number 1,000,000?

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Question 28

What number does the prefix nano stand for?

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Question 29

What prefix is used to indicate the number 0.000001?

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Question 30

????? is the opposition that a circuit or substance creates against the flow of electrical current.

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Question 31

A ???? is wirewound resistor with a sliding tap

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Question 32

Carbon resistors are also called ???? resistors.

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Question 33

There are two basic types of potentiometers, the ???? and the ???

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??? and the ???

Question 34

the fourth band on a carbon resistor tells you the ???? of the resistor (stated as a percentage).

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Question 35

?????, a type of wire with poor conductivity, is often used to make wirewound resistors.

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Question 36

If the fourth color band on a resistor is yellow, the resistor has a tolerance of ???? percent.

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Question 37

Schematic diagrams are simplified drawings of electrical circuits that show all the electrical components.

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Question 38

An open circuit can occur accidentally as a result of a faulty electrical contact, a broken conductor, or a failed component (such as a burned-out light bulb).

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Question 39

A closed circuit is one in which the switch is turned off

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Question 40

A normally closed relay completes the circuit when current is applied to it, and when current is removed, it opens the circuit

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Question 41

When current is applied to a normally open relay, it breaks the circuit, and when current is removed from it, it opens the circuit.

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Question 42

A relay is a type of electrical switch that works through electromagnetism

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Question 43

In electrical work, silver is used as a (n)

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Question 44

Glass, rubber, porcelain, and paper are examples of electrical

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Insulators

Question 45

This statement is correct?

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Question 46

In electrical work, resistance is often represented by the

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Greek symbol

Question 47

A resistor is marked with the following color bands: brown, black, red, and silver. What is the resistance of this resistor?

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Question 48

How is the number 13,000 abbreviated in scientific notation?

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Question 49

A typical, small, dry cel battery has a voltage of

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Question 50

Why would a person who handles electronic components wear a grounded wrist strap?

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Question 51

When two nonconducting materials such as hard rubber and fur are rubbed together, what kind of electricity is generated?

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Question 52

In the electric series, which one of the following materials is the most negatively charged?

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Question 53

Which one of the following metals is the poorest conductor of electricity?

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Question 54

What color band markings would be seen on a 2.2 Kohms resistor?

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Question 55

One millivolt is equal to

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Question 56

Which one of the following statements is correct?

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Question 57

Which of the following statements about relays is correct?

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Question 58

Which of the following is correct definition of the term armature?

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Question 59

How many electrons are there in an atom of carbon?

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Question 60

The air space or material between two charged bodies that prevents the discharge of electricity from one body to the other is the

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Question 61

In the Ohm's law formula, the letter E stands for

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Question 62

Which one of the following letters is used as an abbreviation for electric current?

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Question 63

The prefix Kilo stands for which one of the following values?

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Question 64

The unit of current in which, 6,240,000,000,000,000,000 electrons flow past a given point in a circuit in one second is the

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Question 65

What name is used for a high - power variable resistor?

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