Description : What are three ways you can increase the strength of an electromagnet?
Description : What happens when you reverse the direction of the current in an electromagnet?
Answer : When you reverse current direction in an electromagnet, the magnetic poles will also change.
Description : What is permanent magnet and electromagnet?
Answer : Permanent magnet: A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. As the name suggests, a permanent magnet is 'permanent'. ... an electric current passes through the coil. If the current is interrupted, the magnetism is lost.
Description : What will be the value of the current (in Ampere) in a 40 cm long solenoid in a free space, if it has 400 turns, 2 cm of diameter and produces a magnetic field of 4mT at its center
Description : State any two applications of electromagnet.
Answer : Applications of Electromagnet: Cranes, Motors, Generators, Transformers, Electromagnetic Relays, Circuit breakers, Traction, Measuring instruments, Electrical Bell etc.