Jackson1928
Newbie level 1
- Joined
- Jan 14, 2010
- Messages
- 1
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,281
- Location
- United Kingdom
- Activity points
- 1,299
Hi I need help!
I have a few holes in my Electromagnetics Knowledge which I'd like to plug!
The Biot-Savart Law states that the Electromagnetic Field (H) measured at a diatance (r) falls by 1/2Π (Pie). The full equation is given by H=I/2 Πr, I is the current flowing in a straight line conductor. The field strength is given in A/m (Amps Per Metre)
Here are my questions;
1. Is the Biot-Savart Law applicable to Magnetic fields produced by DC and AC Currents? I.e a battery and and alternating current.
2. Let us assume that I have dialled in some figures and I find that at 1 metre from a straight line power conductor (AC or DC), the field strength is 100A/m. At this measurement point there is a steel plate which is grounded, how can I calculate the current flowing in the plate that has ben induced by the magnetic field?
I appreciate that for AC Mag Fields, Impedance etc may fare in the equations and also resistivity, however I am just looking for a general equation if possible.
The problem I am trying to solve is on a railway. A DC conductor rail is about 0.5m away from metal infrastructure and I wich to be able to confirm that the Biot-Savaty equation works for AC/DC electrification and also get some kind of idea of what current may be induced. I am assuming that a Mag Field generated by a DC source will induce a DC current and Vice-versa.
I know this is such a basic question to some readers. however I have not been able to find these questions and answers in any books or through on-line research.
I could really do with an answer ASAP.
Many Thanks - Jackson 1928
I have a few holes in my Electromagnetics Knowledge which I'd like to plug!
The Biot-Savart Law states that the Electromagnetic Field (H) measured at a diatance (r) falls by 1/2Π (Pie). The full equation is given by H=I/2 Πr, I is the current flowing in a straight line conductor. The field strength is given in A/m (Amps Per Metre)
Here are my questions;
1. Is the Biot-Savart Law applicable to Magnetic fields produced by DC and AC Currents? I.e a battery and and alternating current.
2. Let us assume that I have dialled in some figures and I find that at 1 metre from a straight line power conductor (AC or DC), the field strength is 100A/m. At this measurement point there is a steel plate which is grounded, how can I calculate the current flowing in the plate that has ben induced by the magnetic field?
I appreciate that for AC Mag Fields, Impedance etc may fare in the equations and also resistivity, however I am just looking for a general equation if possible.
The problem I am trying to solve is on a railway. A DC conductor rail is about 0.5m away from metal infrastructure and I wich to be able to confirm that the Biot-Savaty equation works for AC/DC electrification and also get some kind of idea of what current may be induced. I am assuming that a Mag Field generated by a DC source will induce a DC current and Vice-versa.
I know this is such a basic question to some readers. however I have not been able to find these questions and answers in any books or through on-line research.
I could really do with an answer ASAP.
Many Thanks - Jackson 1928