EARTH SCIENCE
MAGNETISM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Electromagnet
|
|
|
Pencil
|
|
|
Coffee mug
|
|
|
Bar Magnet
|
Detailed explanation-1: -A solenoid is used as a temporary magnet (an electromagnet).
Detailed explanation-2: -Temporary magnets include paperclips, iron nails, and other similar items.
Detailed explanation-3: -Some electromagnet uses in the home include an electric fan, electric doorbell, induction cooker, magnetic locks, etc. In an electric fan, the electromagnetic induction keeps the motor rotating on and on making the blade of the fan to rotate.
Detailed explanation-4: -Electromagnets behave as a magnet only when electric current flows through them. So, they are temporary magnets.
Detailed explanation-5: -Motors and generators. Transformers. Relays. Electric bells and buzzers. Loudspeakers and headphones. Actuators such as valves. Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks. MRI machines. More items