Basics Of Electricity

Question 1

Substance or materials used to convey or allow the flow of electrcic current

Answer 1

Electric conductors

Question 2

Positive charge with a mass of 1.67x10^-27 kg

Answer 2

Proton

Question 3

Negative charge with a mass of 9.107 x 10-³⁹

Answer 3

Electron

Question 4

A body is said to be charged, if it has an either an excess or deficit of electrons from its values due to sharing.

Answer 4

Electric charge

Question 5

Unit of electric charge

Answer 5

Coulomb

Question 6

Source of Electricity

By the action of friction between two materials

Answer 6

Friction

Question 7

Sources of Electricity

Through batteries which generates a different or potential means or chemical reaction s

Answer 7

Chemical action

Question 8

Source of Electricity

Two dissimilar metal bonded together in a junction when heated exhibits a difference in potential e.g thermocouple wire

Answer 8

Heat action

Question 9

Source of Electricity

Photo cells

Answer 9

Light action

Question 10

Source of Electricity

A difference of potential across the faces of certain crystals such as quartz

Answer 10

Pressure

Question 11

The capability of doing work

Answer 11

Electric potential

Question 12

The capability of doing work

Answer 12

Electric potential

Question 13

Causes electron movement

Answer 13

Volt

Question 14

The measure of electric current, 63x10⁷ electrons passing a given point in 1 sec

Answer 14

Amperes

Question 15

The best known conductor of electricity, but reacts with air and water (disintegrated) and make then useless for making connections in an electric circuit. The choice is based on the lowest resistance per unit length

Answer 15

Cesium

Question 16

Best conductor to use but high cost prevents if from being commonly used except for switch contacts

Answer 16

Silver

Question 17

The usual choice for conductor on commercial scale

Answer 17

Copper

Question 18

The next best choice by manufacturers of electric wire and cable. Lighter in weight than the copper

Answer 18

Aluminum

Question 19

All non conductors of electricity. Examples include glass, mica, porcelain, paper, aur

Answer 19

Insulators

Question 20

Rate of converting energy, it is the product of voltage and amperes and is the measured in watts

Answer 20

Power

Question 21

It is the factor by which the voltage-ampere product must be multiplied in order to obtain the actual power. It is never greater than 1. The value depends on the kind of opposition offered.

Answer 21

Power factor

Question 22

An atom or molecule which is not electrically balance but electrically charged.

Answer 22

Ion

Question 23

Electrical pressure that causes the electron to love through a conductor (wire)

Answer 23

Volt or voltage

Question 24

Amount of Current flow. It is the standard unit in measuring the strength of an electron

Answer 24

Ampere

Question 25

Rate of measure of power used or consumed

Answer 25

Watt

Question 26

Sure installation that supplies current to lights and convenient outlet

Answer 26

Circuit

Question 27

Opposition to the flow or current by the wires and transformer

Answer 27

Resistance

Question 28

When potential difference between two charges forces a third charge to move, the charge in motion is called ___

Answer 28

Electric current

Question 29

Unit charge of flow equal to one coulomb of charge past a given point in one second.

Answer 29

Ampere

Question 30

Resistance offered by a unit cube of the material

Answer 30

Resistivity

Question 31

A measure of the materials ability to conduct electric current
Unit : mho or Siemens (S)

Answer 31

Conductance