Less number of current in coil of electromagnet creates a……..magnetic field.
a) weaker
b) stronger
c) moderate
d) not affected
Making An Electromagnet:
Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetized even when removed from within the wire coil. Electromagnets are fundamental to many modern technologies.
What happen
during the making of electromagnet?
a) it becomes cool
b) it becomes hot
c) it becomes melt
d) none of these
How to check the magnetic of an electromagnet?
a) by touching
b) by smelling
c) by compass
d) all of these
Applications Of Electromagnets:
Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.
Which of the following is/are used to produce sound waves?
a) round magnet
b) electromagnet
c) bar magnet
d) all of these
Most stereo speakers work on……
a) wire magnet
b) electromagnet
c) bar magnet
d) all of these
