Question

a. define Electromagnetic field theory and explain 2 engineering applications of electromagnetic field

b.why is modulation of waves necessary

c. differences between bio- savart and amperes law

Answer 1

An electromagnetic field is a non Quantum Field produced by moving electric charges.

electromagnetic field theory it is a field described by classical electrodynamics quanta sized electromagnetic field tensor in Quantum electrodynamics. Electromagnetic field theory is the study of electromagnetic field which is is made from the combination of magnetic and electric field two engineering application of electromagnetic field.

The electromagnetic field devices I used as Transformers and motors.

2. Modulation allows us to send the signal over a bandpass frequency range if every signal gets his own frequency range then we can transmit multiple signal simultaneously all using different frequency range.

so we can say modulation of wave in necessary for transmission of message signal using radio waves.

3. Bio savart law is used to find the magnetic field over any configuration.

Ampere law is Convenient way to calculate the magnetic field when considering a system with simple geometric configuration