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APPLICATION OF ELECTROMAGNETIC FIELD AND TRANSMISSION SYSTEM

CONTENT

  1. Electromagnetic Field
  2. Galvanometer
  3. Conversion of Galvanometer to Ammeter
  4. Conversion of Galvanometer to Voltmeter
  5. Transformer
  6. Types of Inductance
  7. Electric Motor
  8. How to Make a Simple Electric Motor
  9. Generator

 

Electromagnetic Field

The electromagnetic field is a combination of the electric field and the magnetic field. The electric  field component is produced by the voltage on a current carrying conductor while the magnetic  field is produced by the flow of electric current. The two fields permeate all the space around a  current-carrying conductor.

 

Galvanometer

When current flows through a current carrying conductor placed in a magnetic field, it experiences  a force. This principle is applied in the design of galvanometer. The force is:

  • directly proportional to the current flowing in the conductor
  • directly proportional to the magnetic field strength of the magnetic
  • directly proportional to the length of the conductor

The magnitude of the force is given as

\(F = BIL sin \theta\) ——– (1)

Where;

B- is the strength of the magnetic field of the magnet

I -is the current flowing in the conductor

L -is the length of the conductor

ϴ- is the angle the conductor makes with the direction of the magnetic field

A moving coil galvanometer is an instrument used for detection of very small current.

Lesson tags: Physics Lesson Notes, Physics Objective Questions, SS3 Physics, SS3 Physics Evaluation Questions, SS3 Physics Evaluation Questions First Term, SS3 Physics First Term, SS3 Physics Objective Questions, SS3 Physics Objective Questions First Term
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