Basics - Ohm's law (Sectional Exam 1)

Question 1

Prefix Units

Answer 1

Tera, Giga, mega, Kilo, milli, micro, nano, Pico, femto, Atto

Question 2

Units of measure for force

Answer 2

Pound, Newton

Question 3

Force Formula

Answer 3

Force = mass x acceleration

Question 4

1 pound = ___________ N

Answer 4

4.45 N

Question 5

Units of measure for distance

Answer 5

foot, meter

Question 6

1 inch = _________ cm

Answer 6

2.54

Question 7

Unit of measure for time

Answer 7

Seconds

Question 8

Units of measure for Mass

Answer 8

Slugs, kilogram

Question 9

Work or energy formula

Answer 9

Work or energy = force x distance

Question 10

Units of measure for work or energy

Answer 10

foot-pound
Newton Meter, Joule

Question 11

Power formula

Answer 11

Power = work/time

Question 12

Units of measure for power

Answer 12

foot lbs / seconds
NM/seconds, Joules/second

Question 13

1 hp = _______________ ft lbs per second

Answer 13

550

Question 14

1 hp = _______________ watts

Answer 14

746

Question 15

1 Coulomb = ____________________ electrons

Answer 15

6.24x10e18

Question 16

Watt

Answer 16

Joule/second

Question 17

Amp

Answer 17

Coulomb/second

Question 18

Volt

Answer 18

Joule/Coulomb

Question 19

Ohm

Answer 19

Voltage/Current (E/I)

Question 20

Ohms Law (voltage, resistance, and current)

Answer 20

E = RI
R = E/I
I = E/R

Question 21

Power, voltage, and current

Answer 21

P = EI
E = P/I
I = P/E

Question 22

Power, current, and resistance

Answer 22

P = I^2 R
R = P/I^2
I = sqrt(P/R)

Question 23

Power, voltage, and resistance

Answer 23

P = E^2 / R
R = E^2 / P
E = sqrt(PR)

Question 24

Efficiency formula

Answer 24

Efficiency (%) = (Power out / Power in) x 100

Question 25

kwh Formula

Answer 25

kwh = (watts x hours) / 1000

Question 26

1 kwh = _____________ MJ

Answer 26

3.6

Question 27

Total Cost Formula

Answer 27

$/kwh x kwh = Total Cost