Solenoid & Toroid Explained | Magnetic Fields & Applications | Engineering Essentials

Unlock the secrets of Solenoids and Toroids, crucial components in the study of magnetism and electromagnetic fields. In this video from the 'Electricity & Magnetism' playlist by Engineering Essentials, you will learn how the magnetic field inside a solenoid and a toroid is calculated, their practical applications, and their significance in modern engineering and physics. This tutorial is ideal for Class 11 & 12 Physics students and those pursuing AP/IB Physics or bachelor’s degree engineering across the globe. Discover the difference between solenoids and toroids, how to apply Ampere’s Law to these structures, and understand their relationship with electromagnetism and inductance. Whether preparing for exams like IIT JEE, NEET, or diving deeper into magnetic circuits, this video covers everything you need. Explore more from our Electricity & Magnetism playlist, including Coulomb’s Law, Gauss’s Law, KVL, KCL, Biot-Savart Law, and Lenz’s Law. solenoid & Toroid #engineering #eranand

A solenoid is a type of electromagnet that creates a controlled magnetic field when an electric current passes through a helical coil of wire. The coil's length is much greater than its diameter, and it's made up of many loops or turns. The magnetic field is concentrated on a metal core inside the coil. Solenoids are temporary magnets that can be turned on or off, and their polarity can be easily reversed. They produce a nearly uniform magnetic field similar to permanent magnets, but are more convenient to use because permanent magnets are constant and hard to change. Solenoids convert electrical energy into mechanical work. When an electrical current is introduced, a magnetic field forms around the coil, which draws in a moveable plunger, or armature. Solenoids are used in many common devices, and are especially useful in applications that require force to create mechanical movement, such as Ion Beam Accelerator systems

A toroid is similar to a solenoid that has been bent into a disc shape to close into a loop-like form. It has many turns of enamelled wire wound tightly together with little space between each turn. The magnetic field of a toroid is non-uniform and can be calculated using Ampere's circuit law. Toroids are used in many applications, including: Electric circuits Amplifiers in computers, radios, televisions, and laptops Electric power supply circuits Musical instruments Telecommunication devices Modern medical devices Inverters