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  • Magnetic Effects of Electric Current
  • If the armature rotates 30 times in one second, the frequ...
Multiple choice

If the armature rotates 30 times in one second, the frequency of the alternating emf produced is _________.

  1. 15 Hz

  2. 30 Hz

  3. 50 Hz

  4. 90 Hz

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If the armature rotates 30 times in one second, the frequency of the alternating emf produced is 30 Hz.

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