Question

A simple generator has a square armature 5.0 cm on a side. The armature has 70...

A simple generator has a square armature 5.0 cm on a side. The armature has 70 turns of 0.59-mm-diameter copper wire and rotates in a 0.700-T magnetic field. The generator is used to power a lightbulb rated at 12.0 V and 25.0 W.

Part A:

At what rate should the generator rotate to provide 12.0 V to the bulb? Consider the resistance of the wire on the armature.

Express your answer to two significant figures and include the appropriate units.

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