EARTH SCIENCE
MAGNETISM
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
Motor
|
|
Generator
|
|
Either A or B
|
|
None of the above
|
Detailed explanation-1: -Magnetic fields can be used to make electricity Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current. Electricity generators essentially convert kinetic energy (the energy of motion) into electrical energy.
Detailed explanation-2: -Magnets are important for electric generators because spinning a magnet near a coil of wire produces electricity. For example, a wind turbine is using wind to spin the magnet, a hydroelectric facility does the same, but with the power of moving water.
Detailed explanation-3: -As the blades of the turbines rotate in the direction of the wind, electromagnetic induction occurs within the magnetic field of the permanent magnet in the turbines to produce electricity. A generator connected to the shaft of the wind turbine converts the motion of the blades to electricity.
Detailed explanation-4: -The main reason to use electromagnets in power generators instead of permanent magnets is its strength.