World Series (and Parallel)
Electricity in the Home
Resistance is Futile
I Have The Power
Efficiency
100
This is constant in series.
What is current?
100
Voltage supplied to appliances in your house.
What is 120 V (110 V) or 240 V (120 V)?
100
The effect of adding more resistors in series.
Increased resistance.
100
The two units for electrical energy.
What are joules (J) and kilowatt hours (kWh)?
100
A once commonly used, but inefficient, light source.
What are incandescent bulbs?
200
A parallel circuit with a 9 V battery and 3 branches has this many volts in each branch.
What is 9 V?
200
Protection from too much current found in "modern" homes.
What is a circuit breaker?
200
The best setup of three resistors to produce the least overall resistance.
What is parallel?
200
The energy used to light a 10 W bulb for 1 minute, in joules.
What is 600 J?
200
Common forms of "wasted" energy.
What are heat, light, and sound?
300
The potential difference of four 1.5 V batteries connected in series.
What is 6 V?
300
The purpose of a third prong on a plug.
What is grounding?
300
Four bulbs are put in parallel and one burns out, having this effect on the overall resistance.
What is an increase?
300
The approximate cost of electricity per kWh.
What is 10 cents per kWh?
300
The efficiency of all devices must be less than this amount.
What is 100%?
400
Christmas lights that do not all go out when 1 bulb goes out.
What are parallel?
400
This happens when 15 A of current goes through a 20 A fuse.
What is nothing?
Trick question :)
400
The total resistance of five 3 ohm resistors placed in series.
What is 15 ohms?
400
The amount of energy used by a 1.2 kW heater with 5 hours of use.
What is 6 kWh?
400
The efficiency of a motor that uses 200 J of energy to do 150 J of useful work.
What is 75%?
500
The area in the circuit with the greatest current.
What is coming from the battery (8 to 7) or returning to the battery (2 to 1)?
500
The unit of measurement on your electrical meter.
What is kWh (kilowatt hours)?
500
A common analogy for electrical resistance.
What is a grocery store with multiple checkouts?
(also road with multiple lanes or room with multiple exits)
500
The cost of electricity for July, given that:
Reading in June: 20 000 kWh
Reading in July: 21 500 kWh
Rate: $0.106 per kWh
What is $159?
500
The efficiency of a portable heater that uses 1500 kWh to produce the following:
Heat: 1000 kWh
Light: 300 kWh
Sound: 200 kWh
What is 67%?