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Magnetic Effects of Electric Current — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
Each one of the following changes will increase $emf ($or voltage$)$ in a simple generator except:
  • A
    Increasing the number of turns in the armature coil.
  • B
    Winding the coil on a soft iron armature.
  • ✓
    Increasing the size of the gap in which the armature turns.
  • D
    Increasing the speed of rotation.
✓

Answer

Correct option: C.
Increasing the size of the gap in which the armature turns.
The increase in the size of the gap, in which armature turns, has no effect on voltage.

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