Show:
Electricity
Simple Math
Mega Magnets
Generators
Labs
100
Electricity is formed by the movement of these small particles
What are electrons?
100
What do each of the parts of the V=IR equation stand for?
V is voltage, I is current, R is resistance
100
These are the names of the poles on a magnet
What is the north and south pole
100
This type of transformer would be found nearby homes because of its low voltage and high current that allows multiple appliances to work without causing an electrical fire.
What is a step down transformer
100
The iron fillings around the bar magnet help to show what?
What is a magnetic field
200
A ________ may be composed of a switch, a battery, and a resistor connected by wires.
What is a circuit?
200
If the current is 20amps and the resistance is 5 ohms, what is the voltage?
100 volts
200
This area around a magnet is where the force is strongest
What are magnetic poles
200
This power plant is the only power plant that does not use a generator to generate electricity.
What is solar power
200
You created this when you wrapped coil wire around an iron nail and magnetized it temporarily to pick up paper clips.
What is a ferromagnet
300
The space around an object in which the object can exert a force. Depends on strength and distance of charge.
What is the electromagentic (electric or magnetic) field?
300
If the voltage is 120V and the current is 4 amps, what is the resistance?
30 ohms
300
This field surrounds the Earth and interacts with solar flares to form the Northern and Southern lights
What is the magnetosphere
300
A __________ converts electrical energy into mechanical energy
What is a motor
300
You created this when you wrapped wire around an iron nail and plugged the ends of the wire to a battery to produce a magnetic field to pick up paper clips.
What is an electromagnet
400
Name the three different types of charge transfer and how they work.
What are:
Induction - the transfer of a charge from one object to another without the objects touching.
Friction - the transfer of electric charge when an object rubs against another and picks up elections.
Contact - the transfer of charge that is transferred when a charged object touches another object.
400
Calculate the number of turns needed in the secondary winding of a transformer to transform a primary voltage of 10 volts up to 40 volts, if the primary is 25 turns of wire.
Transformer problems are solved in ratios so voltage increased by 4 times so will the amount of turn of wire so 25 X 4=100 turns needed in the secondary winding.
400
A ____________ is wrapped coil in the form of a helix that can induce a current
What is a solenoid
400
This part connects the turbine to the generator
What is the shaft
400
You attempted to make this when you built a solenoid hooked up to a battery with a magnet underneath.
What is a simple motor
500
The continuous flow of electrical charges that is measured in amps.
What is current?
500
A 1000 volt wall outlet supplies power to a strobe light with a resistance of 2000 ohms. How much current is flowing through the strobe light?
What is .5 amps
500
This Danish physicist and chemist who discovered that electric currents create magnetic fields, an important aspect of electromagnetism.
Who is Hans Orsted
500
In a geothermal power plant, the hot steam mechanically spins the turbine, but some of the hot steam gets released in this part which turns the hot steam into water to return back to land.
What is the condensor
500
This is something you can add in order to make a stronger electromagnet
What is more coils wrapped around the iron nail or adding a stronger battery