lecture 1

Question 1

____ is carried by the electrons and proton with an atom.

Answer 1

electric charge

Question 2

____ carry negative charge.

Answer 2

electrons

Question 3

____ carry positive charge.

Answer 3

protons

Question 4

The SI unit of electric charge is _____.

Answer 4

Coulomb

Question 5

One electron or proton has a charge of ______.

Answer 5

1.6 x 10^-19 Coulomb

Question 6

_____ is used as a universal reference conductor.

Answer 6

copper

Question 7

1 cubic meter of copper has ______ free electrons.

Answer 7

8.5 x 10^28

Question 8

_____ are electrons which are not attached to a specific atom and is free to move.

Answer 8

free electrons

Question 9

_____ is sometime called as conduction electrons.

Answer 9

free electrons

Question 10

_____ is the rate of electron movement or electron flow in a given material.

Answer 10

electric current

Question 11

The SI unit of current is _____ or commonly called Ampere.

Answer 11

Coulomb per second

Question 12

____ is the drift velocity of the conduction electron is very small since the number of free electrons in a conductor is very large.

Answer 12

electron drift velocity

Question 13

____ is the energy provided by a cell or battery or a generator per Coulomb of charge passing through it.

Answer 13

electromotive force (emf or voltage)

Question 14

The SI unit of emf is ____ or commonly called volt.

Answer 14

joule per coulomb

Question 15

____ is a form of energy used to run or operate various electrical devices.

Answer 15

electric energy

Question 16

Standard unit of electric energy is _____ or kilojoule.

Answer 16

joule

Question 17

The other common units of ____ are kilowatt-hour and megawatt-hour

Answer 17

electric energy

Question 18

____ is the rate of consuming the electric energy.

Answer 18

electric power

Question 19

Standard unit of electrical power is ____.

Answer 19

watt

Question 20

____ is the property of a material to oppose or resist the electron flow.

Answer 20

electric resistance

Question 21

The SI unit of electric resistance is ____.

Answer 21

ohm

Question 22

The resistance of a conductor varies ____ as the length.

Answer 22

directly

Question 23

The resistance of a conductor varies ____ to the cross-sectional area.

Answer 23

inversely

Question 24

_____ of a material is the resistance offered by 1m length of the material having a cross-sectional area of 1sqm.

Answer 24

specific resistance or resistivity

Question 25

____ is an old unit in specifying the cross-sectional area of a wire.

Answer 25

circular mil (CM)

Question 26

_____ is equal to the area of a circle having a diameter of 1 mil.

Answer 26

1 CM

Question 27

Assuming no materials were wasted during the drawing process, the resistance of the wire varies ____ as the square of the length.

Answer 27

directly

Question 28

Assuming no materials were wasted during the drawing process, the resistance of the wire varies ____ as the fourth power of its diameter.

Answer 28

inversely

Question 29

____ is the reciprocal of resistance.

Answer 29

conductance

Question 30

The SI unit of conductance is _____.

Answer 30

siemens

Question 31

The old nit is of conductance is called ____.

Answer 31

mho

Question 32

____ is the reciprocal of resistivity.

Answer 32

conductivity

Question 33

The SI unit of conductivity is _____.

Answer 33

siemens per meter

Question 34

As a standard, the reference conductor is the ____ whose resistivity is 10.37 ohm-CM per foot.

Answer 34

annealed copper

Question 35

The resistance of all conductors will _____ as the temperature of the conductor increase.

Answer 35

increase

Question 36

For annealed copper wire, the inferred absolute zero temperature is _____ deg C.

Answer 36

234.5