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Which of the following will not increase voltage in a simple generator?

1. Increasing the number of turns in armature coil
2. Winding the coil on a soft armature
3. Increasing the size of the gap in which the armature turns
4. Increasing the speed of rotation.

Correct answer: Increasing the size of the gap in which the armature turns

Solution

In a simple generator, induced voltage depends on how much magnetic flux cuts the coil and how fast that flux changes. Increasing the air gap makes the magnetic circuit less effective, reducing flux density and therefore not increasing the voltage.

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