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using a stronger ferromagnetic material for the core. :)
No, as in this case,the rod is the magnet,and the strength of a magnet does not depend on its size.
a donut
welll a scrap heat metal magnet works because it has an electromagnet inside it. The electromagenet has a soft iron core (so that when it can be turned on and off), a coil of wire with lots of turns (to increase the strength of the magnet), and the voltage is very high( also to increase strength.
because exhibits maximum flux density requires small magnetising field exhibits low hysteresis loop
As current increases, the electromagnet strength will increase.
-- Increase the current (amperes) flowing through the coil of wire that surrounds the electromagnet. -- Increase the number of 'turns' of wire in the coil.
Yes
Yes
using a stronger ferromagnetic material for the core. :)
Add a battery
For a simple copper wire around iron nail electromagnet, increasing the number of rounds the copper wire makes around the nail will increase the electromagnet's strength. Also, increasing the voltage applied(adding a battery) will increase the magnetic field.
-- Use greater length of wire. -- Wind it into more turns around the coil. -- Decrease the diameter of the coil. -- Increase the electrical current through the coil. Each of these actions will increase the strength of the electromagnet.
No, as in this case,the rod is the magnet,and the strength of a magnet does not depend on its size.
a donut
a donut
One way to increase the strength of a copper electromagnet is by adding another coil. Another way is by wrapping the copper coil around a nail made of iron.Adding more loops to the wireWrapping the copper wire around an iron nailIncreasing the current