The    French    scientist,    Ampere,    (1775- 1836), conducted a series of experiments on the force between current carrying conductors. He found that: force per metre of wire ( I1*I2/r) where I1 and I2  are the currents flowing in the conductors and r their distance apart. The  relationship  was  found  to  apply  to very long, thin, parallel wires.

He    concluded    that  electric currents produce  all  magnetic  fields.  It  is  now known  that  the  magnetic  properties  of solids    can  be attributed   to orbiting electrons, including a contribution from electron   spin,   both   of   which   can   be regarded as current flow (movement of charge), and that this accounts for the different magnetic properties of materials. The only    modification  to  Ampere's conclusion is that in magnetic materials the atoms align into magnetic 'domains' of macro-dimension.

Ampere also found experimentally that the magnetic field due to a current-carrying conductor falls off with distance from the wire according to 1/r, so the density of (imaginary)   flux  lines   must   show  this effect, with the number per unit area (i.e. their density) falling as 1/r.

Posted Date: 8/22/2012 3:51:36 AM | Location : United States

Ask an Expert

Related Discussions:- Ampere''s theorem, Assignment Help, Ask Question on Ampere''s theorem, Get Answer, Expert's Help, Ampere''s theorem Discussions

Write discussion on Ampere''s theorem
Your posts are moderated

Write your message here..

Related Questions

Power diodes, theory and general purposes theory and general purposes

Define explicit - implicit and parametric representations, Give an industri... Give an industrial look at modern CAM/CAD. Define explicit, implicit and parametric representations. What are the basic advantages of parametric representations over the impli

Apply required morphological operations and give the output, You are given ... You are given a binary image consisting of only zeros and ones, see image-A. Apply required morphological operations and give the output images on the grid.

Voltage breakdown Diode, Help me, i need some answer regarding Voltage brea... Help me, i need some answer regarding Voltage breakdown. What formula do I use?

Why are waveguides not used at low frequencies, Q. Comment brie?y on the fo... Q. Comment brie?y on the following: (a) Why are waveguides not used at low frequencies? (b) Why are open-wire lines not generally used as guiding structures at very high freq

Engineering design, following on from the first tma in this module, produce... following on from the first tma in this module, produce a design report for one design of the product based on one of the scenarios covered on the following pages.

Electromagnet.., force and torque in magnetic field system force and torque in magnetic field system

Dc electric motors, T h er e are three main types -   The Shu... T h er e are three main types -   The Shunt Connected DC motor in which the armature coils are connected in parallel with the field coils   The Serie

D flip flop - introduction to microprocessors, D Flip Flop As we have ... D Flip Flop As we have seen  in the SR flip flop  when the inputs  S= R  are applied the forbidden or indeterminate state occurs.  This state can destabilize the SR file flop.

Explain conduct insulation resistance test, Explain conduct insulation resi... Explain conduct insulation resistance test on 100 VA inverter used for mobile and Laptop charging sockets? Ans: The insulation resistance of the inverter shall be calculated w