On a Circuit diagram what is the symbol for motor?
A circle with a dot in it
100
What end of the battery is positive?
Cathode
100
Explain what a semiconductor is
Allows some movement of charge but doesn't flow easily
100
If voltage is 600 and current is 12 what is the resistance?
50 Ohms
100
Electrical power is generated using different sources of energy. Which of the following sources of energy produces the most pollution?
A. Wind
B. Water
C. Sunlight
D. Coal
D. Coal
200
If on a parallel circuit in which the bulbs are on different paths and one bulb burns out, then will any of the other bulbs turn on?
Yes, they will all turn on
200
What energy change is the seebeck effect used in?
Heat to Electricity
200
Name two out of three laws of charges?
Like objects repel, two opposite charges attract, charged objects attract neutral objects
200
What does kWh stand for?
Kilowatt hours
200
When you put a positively charged rod near a balloon the balloon moved away. What is the charge of the balloon?
Positive
300
What instrument measures the flow of electricity?
Galvanometer
300
Which of the following modifications to an electromagnet will increase its strength?
A. Using a larger iron core
B. Using fewer coils of copper wire
C. Increasing the resistance of the iron core
D. Decreasing the current passing through the coils of copper wire
A. Using a larger iron core
300
A waterfall can be used to model current, voltage and resistance. If a waterfall is wide and free flowing it models high ______?
Current
300
What is the formula for Ohms law?
V=IR
300
What are the four main parts of an electrical circuit?
Source: Cell or Battery
Conductor: Wire
Control: Switch
Load: Lamp or motor
400
On a microcircuit what does a transistor do?
It is often used instead of a switch on a microcircuit. Transistors have no moving parts and can be made much smaller than traditional switches used in homes.
400
What device is used to transform electrical energy into motion?
Quartz
400
When a resistor is added to a circuit the total resistance increases. Is this a parallel or series circuit?
Series
400
Find the efficiency of a 450W iron that is used for 40mins and in that time produces 9.3x10^5J of useful heat. What is the efficiency of the iron?
86.1%
400
A machine which creates static electricity through elections gathering at its height is called _______
Van de Graff (Van Giraffe)
500
In a parallel circuit what is the resistance when R1=0.1 OHMS R2=0.2 Ohms R3=3 MOhms
0.029 Ohms
500
Name at least three of the parts of a Saint Louis Motor?
Brush, Permanent Magnet, Split Ring Commutator, Armature
500
If Susie has a machine with 95% efficiency and used a thermocouple to change the energy, would this machine become 100% efficient?
Nah, man. A machine can NEVER be 100% efficient.
500
What is the energy in Kilowatt hours for 2.2years (assuming 365days a year) with a power of 0.1?
1927.2Kilowatt hours
500
EnerGuide labels indicate a machines energy consumption rating. The energy consumption is demo started using what measurement per year?