Information About Electric Current And Magnetism

• The needle of a compass is a small magnet.
• One end of it which is facing north is called North Pole and the other end which is facing south is called South Pole. 
• A magnetic field exists around the magnet, in which the force of the magnet can be tested.
• Outline lines are used to represent a magnetic field. 
• The field line is the path on which the imaginary free North Pole behaves to move. 
• The direction of the field near a point of magnetic field is indicated by the direction of motion of the North Pole held near that point. 
• Where the magnetic field is stronger, the field lines are shown closer to each other.
• An electromagnetic metal wire is associated with a magnetic field. 
• The field lines around the wire are in the form of many concentric circles, the direction of which is given by the right hand rule. 
• The pattern of magnetic field around a conductor depends on the shape of the conductor, the magnetic field of an electromagnetic solenoid being similar to the magnetic field of a Gajia magnet.
• Electromagnet - A magnet has a soft iron core around which a coil of copper wire with an insulating cover is wrapped, It feels the force when an electric current conductor is placed in a magnetic field. 
• When the direction of the field and the direction of the current are perpendicular to each other, the direction of the force exerted on the conductor wire is both perpendicular and is given by Fleming's left hand rule, it is the base of the electric motor. 
• An electric motor is a device that can be used to convert electrical energy into mechanical energy. 
• Electromagnetic induction is a phenomenon in which an induced current is generated in a coil placed in a magnetic field that changes over time. 
• The magnetic field also varies due to the relative motion between the coil and the magnet placed close to the coil. 
• If the coil is placed close to an electric current conductor the magnetic field changes either due to a change in the current flowing through the conductor or due to the relative motion between the conductor and the coil. 
• The direction of the induced flow can be given using Fleming's right hand rule.
• Generator converts mechanical energy into electrical energy.  It works on the principle of electromagnetic induction. 
• We receive AC current in our homes with an electrical current of 220 V with a frequency of 50 Hz.
• There is a difference of 220 V between the two wires, the third is the earthing wire, which has a green insulating casing and is attached to a metal plate deep inside the ground. 
• Fuse is a very useful safety device to protect the circuit from damage caused by short circuit or overloading.