November 25, 2015

Homework Help: Physics (please check)

Posted by BAdams on Wednesday, June 4, 2008 at 2:27pm.

Please let me know if my answers are not correct/not thorough enough.

1) Q:What happens when the number of loops in the armature of a generator is increased?

1) A:More loops= more voltage

2) Q: Why does a piece of iron behave like a temporary magnet when placed in a magnetic field?

2) A: Iron can become magnetic when placed in a magnetic field because of its crystalline structure. It has a property called ferromagnetism. When in a magnetic field the domains align in the same direction.
(I got this from a variety of sources, should it be worded different?)

3) Why is an antenna designed to be one-half of the wavelength of the wave it is supposed to receive?

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