Difference between Solenoid and Toroid

In this article, we are going to study about the Solenoid and Toroid. Both Solenoid and Toroid are closely related to each other, and they also have some differences. So, in this article, we are going to study how the Solenoid is different from a Toroid. We shall also learn the different applications of the Solenoid and Toroid in our daily life. Both Solenoid and Toroid are related to electricity, and they have a lot of applications in our daily life.

What is a Solenoid?

Solenoid is a device which is made up of the electric wire. A solenoid is generally formed when a long wire is bent into coils and the coils together form a helical shape. A solenoid is used in a lot of experiments which are related to the magnetic field. A solenoid is mainly works on the electromagnetism. Solenoid consists of the uniform electric field inside it. The magnetic field in a solenoid is only generated when it is connected to the electricity. Solenoid only works when an electrically conducting wire is used to make coils. A solenoid will get the properties of an electromagnet when it is connected to electricity. A solenoid can also be created by wrapping the electrically conducting wires around a magnet or magnetic core. The wires used in the solenoid should always be enameled so that the wires will be insulated from each other. Every turn in the solenoid will be enclosed in the circular loops. The magnetic field generated is always equal to the total magnetic field that is generated by a solenoid. To find the total magnetic field that is generated by a Solenoid can be found using a formula which is given by the vector sum of the force produced by every single turn in the Solenoid.

There are so many different types of solenoids and all of them work on the same principle. They are differentiated based on the material used and the functionality of a solenoid.

The Formula for the Magnetic field of the solenoid is given by:

F = µ0nI

In the above formula, n represents the number turns in unit length and I represent the total amount of current flowing in the wire or the solenoid.

What is a Toroid?

Toroid is similar to Solenoid. Iit is an endless solenoid which is made in a circular shape. Toroid is constructed in a hallow circular shape and it has many turns of the electrically conducting wire. The wire used for Toroid should be enamelled because it acts as the insulator between the coils. The wired is coiled very closely with a very less space between the two coils or turns. The Toroid does not produce a uniform magnetic field inside it. The Magnetic field is always generated inside the Toroid. For a normal Toroid the external magnetic field is always zero. The magnetic field will be zero because the net current flowing through the circular path that is lying outside the toroid is zero.

The magnetic field generated by a Toroid will be given using a formula

B = µO NI/2pr

Difference between Solenoid and Toroid in Tabular Form

Solenoid	Toroid
A solenoid is constructed by bending a long wire closely in a circular way in the shape of a cylinder and the wire should be enameled or insulated.	A toroid is similar to a solenoid. Simply, a toroid is made by bending the solenoid in a circular shape.
Magnetic field in the solenoid is always generated outside it.	Magnetic field in the Toroid is always generated inside it.
The Magnetic field generated by solenoid is always uniform inside a Solenoid.	The Magnetic field generated by the Toroid is not uniform inside a Toroid.
The value of the magnetic field outside a Solenoid will not be zero.	The value of the magnetic field outside the Toroid will always be zero.
The magnetic field generated by the solenoid can be given by the formula F = µ0nI.	The magnetic field generated by the Toroid can be given by the formula B = µO NI/2pr.
Solenoid is used in valves and antennas and many other daily life applications.	Toroid is used in medical devices, and it has a lot of applications in telecommunication.