Answer:
the amount of current flowing through the wire
the number of coils in the wire
the material of the core
Explanation:
When current is passes through a coil, it generates magnetic field. This forms an electromagnet. The strength of the magnetic field generated by an electromagnet can be controlled. It depends on the following factors:
- Number of coils in the wire
- Amount of current flowing in the coil
- The material which forms the core
B = μ n I
where μ is the permeability, n is the number of turns in the wire and I is the current.
The strength increases with in number of coils and amount of current.
Other than this, the magnetic field strength increases if the core is made of magnetic material such as Iron.
