I am a Danish science teacher who first experimented with the effects of an electric current on the needle of a compass.
Who is Hans Christian Oersted?
100
I discovered that a current can be produced by pushing a magnet through a coil of wire.
Who is Michael Faraday?
100
Transformers increase or decrease the _________ of alternating current.
Who is voltage?
200
Naturally occurring magnetic rocks.
What are Lodestones?
200
__________ used lodestones to make the first compasses.
Who are Sailors?
200
Never grasp of touch an ______________ wire connected to a power source.
What is uninsulated?
200
The law of physics that states "an electric current can be produced in a circuit by changing the magnetic field crossing the circuit" is known as ______________.
What is Faraday's Law?
200
The voltage induced in the secondary circuit of a transformer depends on the number of loops, or _______, in the coil.
What are turns?
300
All magnets have at least one pair of ________.
What is poles?
300
__________ magnetic field has both direction and strength.
What is Earth's?
300
A coil of wire with an electric current in it is called a ___________.
What is Solenoid?
300
Electromagnetic induction does not violate the ____________________________.
What is the law of conservation of energy?
300
One wire would be attached to a source of alternating current, such as a power outlet, and is called the _________ circuit.
What is primary?
400
Iron is a ________ magnetic material.
What is soft?
400
The poles of magnets are named for the ____________ pole to which they point.
What is geographic?
400
The movement of charges is the cause of all _________.
What is magnetism?
400
The force on the charges is at a maximum when the wire is moving ______________ to a magnetic field.
What is perpendicularly?
400
Step-up and step-down transformers are used in the transmission of ____________ form power plants to homes and businesses.
What is electrical energy?
500
The greater the distance between a nail and a magnet, the ___________ the nail's magnetic force.
What is weaker?
500
The _____ has a magnetic field and ejects charged particles into space.
What is sun?
500
Solenoids have a similar magnetic field to __________?
What is bar magnets?
500
A machine that converts mechanical energy into electrical energy.
What is a generator?
500
__________transformers are used near homes to reduce the voltage because they are safer.