1) The units of magnetic dipole moment are (explain): A. Ampere B. Ampere*meter

Question

1) The units of magnetic dipole moment are (explain):
       A. Ampere
       B. Ampere*meter
       C. Ampere*meter^2
       D. Ampere/meter
       E. Ampere/meter^2

A copper wire is placed to be parallel to the x-axis. The magnetic field is in the y-axis. When this copper wire is moving in the z-direction, in which direction the conducting electrons in the copper wire will move? Explain.

Solenoids (see p. 454-456) are used to generate uniform magnetic fields. There is a relation B=nu(0)nI. Explain why B is proportional to n inside the solenoid?

Explanation / Answer

a) units of dipolement are

= NIA

where N is number of turns

so Amphere meter2

2) from fleming left habd rule magnetic field is ydirection and force is in   z direction then conducting electrons moving in x- direction

3) magnetic field inside solenoid is propotion to

B = 0 nI

n is number of turns per length

where 0 is constant

then B is propotinal to n and current I

B nI

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