Cable Math

Question 1

describes the simple algebraic relationship between voltage current and resistance

Answer 1

Ohm’s law

Question 2

Voltage, also referred to as electromotive force is given this symbol in Ohms Law

Answer 2

E

Question 3

Current is given this symbol in Ohms Law

Answer 3

I

Question 4

resistance is given this symbol in Ohms law

Answer 4

R

Question 5

In this, the position of digits indicates the value associated with those digits

Answer 5

positional number system.

Question 6

We typically write numbers using this

Answer 6

base 10

Question 7

The first digit to the left of the decimal place is used for this

Answer 7

whole numbers 0 through 9

Question 8

The second digit to the left of the decimal place is used for what

Answer 8

multiples of 10

Question 9

The third digit to the left of the decimal place is used for

Answer 9

multiples of 100

Question 10

The first digit to the right of the decimal place represents multiples of

Answer 10

tenths

Question 11

the second digit to the right of the decimal place represents multiples of

Answer 11

100ths

Question 12

a way to write numbers that are multiples of ten.

Answer 12

Exponential notation

Question 13

convenient way to write numbers that are very large or very small

Answer 13

Scientific Notation

Question 14

Scientific Notation formula

Answer 14

“a” times ten to the power “b”

Question 15

“a” in the scientific notation formula

Answer 15

mantissa

Question 16

“b” in the scientific notation formula

Answer 16

exponent

Question 17

the exponent of ten is always a power of three in this type of notation

Answer 17

Engineering notation

Question 18

Ten to the 3rd power is called

Answer 18

kilo

Question 19

Ten to the 6th power is called

Answer 19

Mega

Question 20

Ten to the 9th power is called

Answer 20

Giga

Question 21

10 to the negative 3rd power is called

Answer 21

Milli

Question 22

10 to the negative 6th power is called

Answer 22

micro

Question 23

10 to the negative 9th power is called

Answer 23

Nano

Question 24

convenient way to express the ratio of two power levels

Answer 24

bel

Question 25

Formula for ratio in bels

Answer 25

log10 (power level 1/power level 2)

Question 26

Formula for ratio in decibels (dB)

Answer 26

10 x log10 (power level 1/ power level 2)

Question 27

Power ratio of 2 to 1 corresponds to what

Answer 27

3dB change

Question 28

Any doubling of power is represented by

Answer 28

3dB

Question 29

Any halving of power is represented by

Answer 29

-3dB

Question 30

Any power changed by a factor of 10 is represented by

Answer 30

10dB

Question 31

Any power reduced by a factor of 10 is represented by

Answer 31

-10dB

Question 32

how much smaller is a decibel compared to a bel?

Answer 32

1/10

Question 33

dBmV

Answer 33

decibel-millivolt

Question 34

standard unit used in coaxial and HFC networks to measure absolute RF power

Answer 34

decibel-millivolt (dBmV)

Question 35

RMS

Answer 35

root mean square

Question 36

a way of expressing the value of a changing or AC voltage.

Answer 36

root mean square (RMS)

Question 37

In most coaxial and HFC networks the characteristic impedance is

Answer 37

75 ohms

Question 38

10 times the logarithm base 10 of a power level in watts divided by 0.001 watts

Answer 38

dBm