Show:
Electric Bell
Relay
Lifting Magnet
Maglev
100
Putting this inside of a solenoid increases the magnetic field strength when an electric current flows through the coil of wire.
What is iron
100
An electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current
What is relay
100
True or False - A lifting magnet can pick up glass.
What is False
100
This city is the only city with a commercial Maglev train.
What is Shanghai
200
A cylindrical coil of wire which acts like a magnet when carrying electric current.
What is solenoid
200
He invented the relay and the electric bell.
What is Joseph Henry
200
True/False - Lifting magnets do not need electric current to flow through the wires due to the iron in it.
What is False
200
The coils that lift the train above the ground are called _____.
What is levitation coils
300
Name 3 parts that are needed to make an electric bell.
What is Solenoid Iron Rod Spring Switch Voltage Bell
300
When would a relay be needed in real life?
What is Eg. fixing an electric motor to avoid electrocution, etc.
300
Name a realistic example of when/where lifting magnets are used.
What is construction sites (answers may vary).
300
The Maglev train in Shanghai goes to a maximum speed of ___.
What is 430 km/hr.