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NemiM [27]
4 years ago
15

The diagram shows a simple electric generator that Keisha is studying.

Physics
2 answers:
Montano1993 [528]4 years ago
5 0
<u>Answer</u>

<span>C. It will move back and forth between a large positive and a large negative value.</span>


<u>Explanation</u>
The generator in the diagram produces an alternating current. This means the direction of the current every time the generator rotates. The current produced is large. 
The needle will move back and forth in every rotation. 

creativ13 [48]4 years ago
5 0
In this kind of generators, Keisha has a wire that will rotate inside a magnetic field.
Since the electrical field generated depends on the inclination of the wire with respect to magnetic field lines, and this inclination varies with time, Keisha will get a varying electrical field, therefore also a varying electric current: the value will be zero when the wire is parallel to the magnetic field lines, the maximum positive value will occur when the wire is perpendicular to the magnetic field lines after one fourth of rotation, then again zero when the wire is parallel and the maximum negative value will occur when the wire is perpendicular to the magnetic field lines, but upside down, <span>after three fourths of rotation.</span>

Therefore, we expect the needle to move back and forth between a large positive value to a large negative value.  
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