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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
Question
Each one of the following changes will increase emf (or voltage) in a simple generator except:
  1. Increasing the number of turns in the armature coil.
  2. Winding the coil on a soft iron armature.
  3. Increasing the size of the gap in which the armature turns.
  4. Increasing the speed of rotation.
✓

Answer

  1. Increasing the size of the gap in which the armature turns.

Explanation:

The increase in the size of the gap, in which armature turns, has no effect on voltage.

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