1) If a charge particle moves in a straight line and there no other forces on it
ID: 1273286 • Letter: 1
Question
1) If a charge particle moves in a straight line and there no other forces on it except possibly from a magnetic field, can you say with certainty that no magnetic field is present? Explain.
2) The armature of an ac generator has 100 turns. Each turn is a rectangular loop measuring 8.0 cm by 12 cm. The generator has a sinusoidal voltage output with an amplitude of 24 V. If the magnetic field of the generator is 250 mT;
a) what frequency does the armature turn?
b) If you double the B and cut in half, how does this affect the amplitude?
Explanation / Answer
1
NO. Charged particle would beaffected by magnetic field ONLY
if particle were moving perpendicular to the field. Thus, if charged
particle were moving parallel to magnetic field, it wouldmove in a
straight line, and no observable effects would be noticed. Therefore
one could NOT rule out the presence of a magnetic field.
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