Define the following:
Electromagnet
Important Questions on Electric Current and Its Effects
Define the following:
Filament
About Induction: We have learnt that when electrical current flows in a conductor, a magnetic field is created around it. Similarly, if we move a wire inside a magnetic field there will be an electrical current generated in the wire. Current is produced when a conductor is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. This process of generating current in a conductor by placing the conductor in a changing magnetic field is called induction. This is called induction because there is no physical connection between the conductor and the magnet. The current is said to be induced in the conductor by the magnetic field. One requirement for this electromagnetic induction to take place is that the conductor, which is often a piece of wire, must be perpendicular to the magnetic lines of force in order to produce the maximum force on the free electrons. The direction that the induced current flows is determined by the direction of the lines of force and by the direction the wire is moving in the field. What happens when a conducting wire is moved in a magnetic field?
Read the passage and answer the questions that follow.
About Induction
We have learnt that when electrical current flows in a conductor, a magnetic field is created around it. In a similar manner, if we move a wire inside a magnetic field there will be an electrical current generated in the wire. Current is produced when a conductor is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. This process of generating current in a conductor by placing the conductor in a changing magnetic field is called induction. This is called induction because there is no physical connection between the conductor and the magnet. The current is said to be induced in the conductor by the magnetic field. One requirement for this electromagnetic induction to take place is that the conductor, which is often a piece of wire, must be perpendicular to the magnetic lines of force in order to produce the maximum force on the free electrons. The direction that the induced current flows are determined by the direction of the lines of force and by the direction the wire is moving in the field.
Explain the phenomenon of induction?
