Energy & Power

Question 0

The opposition to current flow is more properly called?!

Answer 0

Resistance

Question 1

The force motivating electrons to flow in a circuit is called what?

Answer 1

Voltage

Question 2

what are the units of resistance

Answer 2

Ohms

Question 3

One coulomb of charge is equal to?!

Answer 3

6,250,000,000,000,000,000 electrons

Question 4

What is the standard unit for power? Metric unit for power?

Answer 4

Horsepower, watts

Question 5

The most common schematic symbol for a resistor is?!

Answer 5

A zig-zag line

Question 6

What is the total resistance of a series circuit with three resistors of 10, 20, & 30 ohms.?

Answer 6

60 ohms

Question 7

Convert 1 kilo ohm to ohms.

Answer 7

1000 ohms

Question 8

What is the total efficiency of 500 workout in 1000 power in?

Answer 8

50 percent

Question 9

Ohms law is V=IR. What does “I,” “V,” and “R” stand for in the equation?

Answer 9

I=current, V=voltage, R=resistance

Question 10

If you have a line of 4 resistors in series with 2.3 ohms, 4.6 ohms, 1.4 ohms, 4.5 ohms what is the total resistance?

Answer 10

12.8 ohms

Question 11

What is efficiency?

Answer 11

The ratio of useful work preformed by a machine or in a process to the total energy expanded or heat taken in.

Question 12

What is the formula for electric power?

Answer 12

P=IV

Question 13

What is electric power measured in?

Answer 13

Watts

Question 14

What is the formula to figure power

Answer 14

P=E/T (power=energy divided by time)

Question 15

1500 joules, is how many Ws

Answer 15

1500 Ws

Question 16

How many watts in 1hp

Answer 16

746w= 1hp

Question 17

What kind of energy does the wind have?

Answer 17

Kinetic energy

Question 18

1.5Mw = ____kw

Answer 18

1500kw

Question 19

15kw=______w?

Answer 19

1500w

Question 20

What’s the base unit measurement of mass?

Answer 20

Kilograms

Question 21

What’s the unit of efficiency?

Answer 21

Efficiency is unit less!

Question 22

How much energy is stored if a battery is charged at a rate of 100 Watts for 10 seconds?

Answer 22

1000 Joules

Question 23

What does 1 horsepower = to?

Answer 23

746 watts

Question 24

Power in. Power out efficiency Power wasted | 1000 500 ? 500

Answer 24

Efficiency= 50%

Question 25

If I get 167 w out of 222 w what is the efficiency?

Answer 25

75%

Question 26

If you have an atom with 25 protons with a +2 charge, how many electrons does it have?

Answer 26

23 electrons

Question 27

What is matter made up of?

Answer 27

Atoms

Question 28

The only reason protons bind together in the nucleus of an atom is because of a much stronger force called?

Answer 28

Strong nuclear force

Question 29

The result of an imbalance of this "fluid" (electrons) between objects is called?

Answer 29

Static Electricity

Question 30

In conductive materials, the outer electrons in each atom can easily come or go, and are called?

Answer 30

Free Electrons

Question 31

The symbol for voltage is ....

Answer 31

"E" or "V"

Question 32

Resistance is measured in .....

Answer 32

Ohms

Question 33

1 Horsepower = how many watts?

Answer 33

745.7 Watts

Question 34

75 Watts equals how many joules per second.

Answer 34

75 joules per second

Question 35

What does a circuit breaker do?

Answer 35

It detects overloads and short circuits, then automatically interrupts the current flow.

Question 36

____________ is where the current through a component actually decreases as the applied voltage across it is increases

Answer 36

Negative Resistance

Question 37

If you have 3600J how many ws is that?

Answer 37

3600 watt seconds

Question 38

What is the formula for power (P)?

Answer 38

P= E/T

Question 39

What is resistivity?

Answer 39

Resistivity is the resistance that a material has per a unit of distance

Question 40

What is a wh?

Answer 40

Watt hour

Question 41

If you have a 5000N brick and you are moving it 10m how much work did you perform?

Answer 41

50000J

Question 42

What do opposite polarities do?

Answer 42

Attract

Question 43

What do similar polarities?

Answer 43

Repel

Question 44

Does a positive ion have an extra electron?

Answer 44

No

Question 45

Electrons tend to _________ other electrons.

Answer 45

Repel

Question 46

Stored energy or energy stored is also known as what?

Answer 46

Potential Energy

Question 47

Can energy be created and destroyed?

Answer 47

No, energy is only conserved. The total energy in a system will stay the same.

Question 48

Power =

Answer 48

E/T | ie. energy divided by time

Question 49

How do cold and hot temperatures effect the conductivity of a wire?

Answer 49

A cold wire allows for a faster current to flow through it. A hot wire has a slower moving current.

Question 50

One horsepower equals how many watts?

Answer 50

745.7

Question 51

What is the symbol for amps?

Answer 51

I

Question 52

What are the symbols for voltage?

Answer 52

E and V

Question 53

Ohms law will help you find?

Answer 53

Resistance,current,and voltage

Question 54

What is the equation for Ohm's law

Answer 54

E=IR

Question 55

If the Voltage increases and the Current Increases the Resistance does what?

Answer 55

Stays the same

Question 56

What type of electricity causes two balloons to stick together?

Answer 56

Statice Electricity.

Question 57

75 Watts equals how many joules per second.

Answer 57

75

Question 58

75 watts equals how many joules per minute?

Answer 58

4,500 Joules per minute

Question 59

75 watts equals how many joules per hour?

Answer 59

270,000 joules per hour

Question 60

20 Watts equals how many joules per hour.

Answer 60

72,000 joules per hour

Question 61

45 Watts equals how many Joules per minute

Answer 61

2,700 Joules per minute

Question 62

If the Voltage stays the same and the Current decreases the Resistance does what?

Answer 62

Increases