using electrical energy wisely

Question 1

What percentage of energy is lost to heat in wires and transformers?

Answer 1

5%

Question 2

Electrical power

Answer 2

rate at which an appliance uses electrical energy

Question 3

What is electrical power measured in?

Answer 3

watts

Question 4

Kilowatt is how many watts?

Answer 4

1000 watts

Question 5

Electrical energy is calculated by

Answer 5

(Kilowatt usage) x (time)

Question 6

Energuide characteristics

Answer 6

Big number showing the Kwh per year of usage
Arrow on a line showing where the device ranges compared to other devices

Question 7

Cost of electrical energy formula

Answer 7

Cost = (price per kWh) x (# of kWh used)

Question 8

Energy used formula

Answer 8

Energy used = kW x h

Question 9

Smart meter

Answer 9

Records the total electrical energy used hour by hour

Question 10

Three different times of using electrical energy

Answer 10

Off peak (green)
Mid peak (yellow)
On peak (red)

Question 11

Peak times are adjusted how many times a year?

Answer 11

twice a year based on the season

Question 12

In summer electricity is in greater demand during the ____

Answer 12

day (air conditioning)

Question 13

In winter electricity is in greater demand during the ________

Answer 13

morning and night (light and heat)

Question 14

Phantom load dewfinition

Answer 14

The amount of electricity consumed by a device when it is plugged in but turned off.

Question 15

TOU definition

Answer 15

time of use

Question 16

ULO definition

Answer 16

Ultra low overnight

Question 17

Average home has a phantom load of

Answer 17

50 watts

Question 18

Percent efficiency formula

Answer 18

(Useful energy output)
—————————— x100
(total energy input)

Question 19

Power formula

Answer 19

Power = Energy
———–
Time

Question 20

watts formula

Answer 20

joules/ time in seconds