Magnetic Effects of Electric Current

This topic states that the magnetic field is the region of influence around a bar magnet or a current-carrying conductor. Magnetic field lines showing the magnetic field can be traced using a magnetic compass. These are the non-intersecting closed curves that repel each other.

This topic explores the concept of magnetic effect of current in detail. It also briefs us on the electric motor, along with its working through a diagram for a better understanding.

This topic explains that a current-carrying conductor experiences a force when it is placed in a magnetic field. This force pushes the conductor out of the magnetic field. The direction of force acting on the conductor is given by Fleming’s left-hand rule.

This topic explains the Ampere’s swimming rule with the help of an example. The rule is illustrated by considering a man swimming along the conductor in the direction of current. It also details the conclusions of this law with the suitable steps.

This topic defines an electric motor, a device that converts electrical energy into mechanical energy. An electromagnet with the soft iron core is used in commercial motors. Electric motors are used in computers, refrigerators, grinders, etc.

This topic highlights the concept of electromagnetic induction. We will learn about galvanometer and how moving a magnet towards the coil sets up a current in the coil circuit.

In this topic, we will learn how an electric generator converts mechanical energy into electrical energy. It works on the principle of electromagnetic induction. Mechanical energy rotates a conductor coil in magnetic field to produce electricity for various use.

This topic teaches us that earthing of domestic electric circuits is done to avoid electric shocks. The power supply consists of a live wire, neutral wire and earth wire. One end of the earth wire is connected deep under the earth, and the other end is connected to appliances.