Devices using permanent magnets and electromagnets

Galvin Pinto asked;

1. List the devices where permanent magnets & electromagnets are used.
2. Sketch the pattern of the field lines around a current carrying:

• Straight Conductor

• Loop of wire

• Solenoid

Ans:

1. Permanent Magnets are used in
• Laboratory magnets
• loud speakers
• microphones
• cyclotron
• generators
• and many more
2. Pattern of the field lines around a current carrying

Straight Conductor

Loop of wire

Solenoid